Sightings 2016

red is a rare or scarce species
green is early (first) or late sighting
blue is a high count
blue is a count that exceeds the 1% level

The 1% level is an indicator of the importance of a wetland area. If 1% of the total North-West European population of a bird species is present on a regular basis, the site is of international importance. See also "De 1%-soorten van de Meeslouwerpolder en de Vogelplas Starrevaart"  (in Dutch) and Population estimates and 1%-levels for waterbird species occurring in the Netherlands: suggestion for standardisation, P.L. Meininger, H. Schekkerman, en M.W.J. van Roomen, Limosa, 68(2):41, 1995.

August 20 - Great Egret 5, Eurasian Spoonbill 11, Eurasian Wigeon 1 male, Garganey 1, Pied Avocet 2, Black-tailed Godwit 2, Common Greenshank 1, Common Sandpiper 9, Black Swan 1.
Meeslouwerplas: Common Kingfisher 1.
August 18 -
Leidschendammerhout: White Stork 27.
Passing: Common Buzzard 7.
August 17 - Great Egret 3, Eurasian Spoonbill 22, Mute Swan 150, Garganey 1, Common Pochard 38, Pied Avocet 3, Dunlin 1, Black-tailed Godwit 5, Common Tern 4, Black Tern 1, Common Kingfisher 2, Black Swan 1.
Meeslouwerplas: Eurasian Sparrowhawk 1, Water Rail 1, Common Kingfisher 1.
Leidschendammerhout: Great Egret 1, White Stork 5, Common Kestrel 1, Northern Wheatear 2.
Passing: European Honey-buzzard 1 S.
August 14 - Great Egret 7, Eurasian Spoonbill 6, Black-tailed Godwit 2, Common Sandpiper 4, Common Tern 8, European Goldfinch 5, Black Swan 1.
Meeslouwerplas: Eurasian Sparrowhawk 1 hunting, Northern Chiffchaff 2, European Goldfinch 10.
Leidschendammerhout: Common Kestrel 1.
Passing: European Honey-buzzard 1, Blue-headed Wagtail 1.
August 13 -
Leidschendammerhout: Common Cuckoo 1 juvenile.
August 12 - Eurasian Spoonbill 2, Northern Lapwing 23, Black-tailed Godwit 4, Common Sandpiper 1, European Reed Warbler 1, European Goldfinch 8, Black Swan 1.
August 8 - Great Cormorant 48, Great Egret 2, Eurasian Spoonbill 3, Mute Swan 119, Greylag Goose 240, Canada Goose 8, Egyptian Goose 10, Black-tailed Godwit 8, Common Sandpiper 2, Common Tern 4, Sand Martin 1, Barn Swallow 80, Common House Martin 60, Black Swan 1.
Leidschendammerhout: White Stork 3, Common Buzzard 1, Common Kestrel 2, Barn Swallow 35, Common House Martin 10.
Passing: White Stork 1, Eurasian Curlew 1.
August 4 - Eurasian Spoonbill 7, Barnacle Goose 61, Black-tailed Godwit 4, Common Sandpiper 1, Sand Martin 1, Common House Martin 8, Black Swan 1.
Leidschendammerhout: White Stork 3, Sand Martin 2, Common House Martin 10.
August 3 - Little Grebe 1, Black-tailed Godwit 8, Common Tern 2, Little Tern 1, Common Swift 20, Sand Martin 2, European Goldfinch 7.
August 1 -
Vlietland: Eurasian Red Squirrel 1.

July 31 - Great Cormorant 42, Great Egret 10, White Stork 3, Eurasian Spoonbill 4, Mute Swan 124, Barnacle Goose 5, Egyptian Goose 9, Gadwall 370, Common Teal 13, Mallard 147, Northern Shoveler 36, Eurasian Coot 350, Eurasian Oystercatcher 5, Lesser Black-backed Gull 45, Common Tern 12, Barn Swallow 40, White Wagtail 1, Black Swan 1.
Meeslouwerplas: Eurasian Spoonbill 10, Water Rail 1, Common Sandpiper 10, Black-headed Gull 580, European Greenfinch 14.
Passing: Great Egret 2 W, Whimbrel 1.
July 30 - Great Egret 4, Eurasian Spoonbill 4, Garganey 3, Western Marsh Harrier 1, Black-tailed Godwit 14, Common Sandpiper 1, Common Swift 80, Common Kingfisher 1, European Greenfinch 2.
Leidschendammerhout: White Stork 4, Black-tailed Godwit 1, Common Kingfisher 1.
Passing: Northern Goshawk 1.
July 28 - Great Crested Grebe 11, Great Cormorant 33, Great Egret 3, Eurasian Spoonbill 6, Mute Swan 108, Greylag Goose 130, Egyptian Goose 6, Eurasian Coot 380, Black-tailed Godwit 10, Common Sandpiper 2, Lesser Black-backed Gull 32, Common Tern 1, Black Swan 1.
July 25 - Great Crested Grebe 9, Great Cormorant 29, Great Egret 4, Mute Swan 112, Greylag Goose 150, Egyptian Goose 8, Common Shelduck 3, Common Pochard 23, Eurasian Coot 380, Eurasian Oystercatcher 4, Northern Lapwing 18, Black-tailed Godwit 14, Lesser Black-backed Gull 18, Common Tern 12, Black Swan 1.
Meeslouwerplas: Mute Swan 27, Eurasian Coot 190, Carrion Crow 7.
July 24 - Great Egret 1, Eurasian Spoonbill 21, Mute Swan 100, Eurasian Wigeon 1 male.
July 23 - Great Cormorant 20, Great Egret 2, Grey Heron 1, Eurasian Spoonbill 15, Common Shelduck 1 juvenile, Gadwall 35, Mallard 35, Northern Shoveler 8, Common Pochard 30, Tufted Duck 75, Spotted Crake 1 calling, Black-tailed Godwit 14, Common Tern 10, Bluethroat 1, Bearded Reedling 1 male.
Leidschendammerhout: Eurasian Sparrowhawk 1, Whinchat 1.
July 22 - Great Egret 1, Whimbrel 1.
July 21 - Great Cormorant 46, Mute Swan 99, Greylag Goose 801.
July 19 - Great Cormorant 59, Great Egret 2, Purple Heron 1, Eurasian Spoonbill 14, Mute Swan 125, Greylag Goose 600, Common Shelduck 12, Garganey 2, Western Marsh Harrier 1 female, Eurasian Coot 150, Eurasian Oystercatcher 4, Black-tailed Godwit 24, Common Sandpiper 1, Common Tern 34, Common Kingfisher 2.
Leidschendammerhout: European Greenfinch 11.
Passing: Northern Goshawk 1, Eurasian Curlew 1.
July 18 - Great Crested Grebe 10, Great Cormorant 66, Great Egret 3, Eurasian Spoonbill 8, Mute Swan 114, Greylag Goose 850, Egyptian Goose 6, Common Shelduck 9, Tufted Duck 2 female 6 pulli, Eurasian Coot 275, Eurasian Oystercatcher 8, Black-tailed Godwit 32, Common Sandpiper 1, Lesser Black-backed Gull 23, Common Tern 28, Common Kingfisher 1.
Leidschendammerhout: Hermine 1.
July 16 - White Stork 2.
Passing: Stock Dove 2.
July 13 - Great Egret 2, White Stork 3, Eurasian Spoonbill 7, Water Rail 1, Black-tailed Godwit 46, Common Reed Bunting 1.
July 12 - Great Cormorant 7, Great Egret 1, Barnacle Goose 1, Little Ringed Plover 1, Ruff 1 male, Black-tailed Godwit 56, Common Sandpiper 1, Lesser Black-backed Gull 30, Common Tern 12.
July 12 - Little Grebe 1, White Stork 2, Eurasian Spoonbill 3, Greylag Goose 101, Barnacle Goose 1, Egyptian Goose 10, Water Rail 1, Ruff 1, Black-tailed Godwit 66, Common Redshank 6, Common Sandpiper 1, Common Tern 13.
Leidschendammerhout: White Stork 5, Greylag Goose 292, Common Kingfisher 1, White Wagtail 1, Common Whitethroat 1.
Passing: Common Buzzard 1, Northern Lapwing 160, Sand Martin 1, Common House Martin 8.
July 10 - Great Crested Grebe 3, Egyptian Goose 10, Common Shelduck 1, Garganey 1 female, Red-crested Pochard 2, Eurasian Oystercatcher 15, Black-tailed Godwit 42, Common Redshank 6, Common Sandpiper 1, Lesser Black-backed Gull 40.
Leidschendammerhout: White Stork 1, Marsh Warbler 1, Common Reed Bunting 1.
July 8 - Great Crested Grebe 5, Great Cormorant 10, Great Egret 1, Eurasian Spoonbill 1, Greylag Goose 350, Barnacle Goose 1, Egyptian Goose 9, Common Shelduck 3, Common Pochard 19 male 5 female, Eurasian Coot 100, Eurasian Oystercatcher 4, Ruff 1 male, Black-tailed Godwit 42, Common Sandpiper 1, Lesser Black-backed Gull 55, Common Kingfisher 1.
July 7 - Great Crested Grebe 15, Great Cormorant 42, Great Egret 2, White Stork 2, Eurasian Spoonbill 9, Mute Swan 103, Greylag Goose 220, Eurasian Oystercatcher 21, Black-tailed Godwit 3, Common Sandpiper 1, Lesser Black-backed Gull 53, Common Tern 20.
Passing: Eurasian Curlew 2.
July 6 -
Leidschendammerhout: White Stork 2, Common Kingfisher 1, Marsh Warbler 1, Common Whitethroat 1.
Passing: Stock Dove 1.
July 4 - Great Crested Grebe 21, Great Cormorant 28, Great Egret 2, White Stork 3, Eurasian Spoonbill 3, Mute Swan 97, Greylag Goose 280, Barnacle Goose 14, Egyptian Goose 17, Common Shelduck 3, Eurasian Oystercatcher 20, Black-tailed Godwit 14, Common Redshank 8, Lesser Black-backed Gull 25, Common Tern 31, European Goldfinch 2.
Leidschendammerhout: White Stork 3, Common Buzzard 1, Marsh Warbler 2, Common Whitethroat 1, Common Reed Bunting 1.
July 3 - Eurasian Spoonbill 6, Common Tern 18.

June 29 - Eurasian Spoonbill 2, Black-tailed Godwit 15, Common Redshank 38.
June 28 - Eurasian Spoonbill 7, Mute Swan 77, Greylag Goose 180, Barnacle Goose 37, Egyptian Goose 13, Tufted Duck 4 female + 13 pulli, Eurasian Oystercatcher 31, Common Redshank 4, Lesser Black-backed Gull 42, Common Tern 16.
June 26 - White Stork 1, Mute Swan 91, Common Cuckoo 1, Common House Martin 10, Bluethroat 2, Marsh Warbler 1, Bearded Reedling 1.
June 25 - Barnacle Goose 6, Egyptian Goose 13, Eurasian Oystercatcher 8, Common Tern 11.
Leidschendammerhout: Northern Goshawk 1 hunting, European Goldfinch 5.
June 25 - Black-necked Grebe 2.
June 21 - Great Crested Grebe 8, Great Cormorant 7, White Stork 2, Eurasian Spoonbill 5, Mute Swan 87, Egyptian Goose 9, Common Shelduck 5, Tufted Duck 73 + 7 pulli, Eurasian Coot 212, Eurasian Oystercatcher 9, Lesser Black-backed Gull 60, Common Tern 11, Barn Swallow 15, Common House Martin 25, European Goldfinch 2.
Leidschendammerhout: White Stork 2, Common Whitethroat 2, Common Reed Bunting 2.
June 9 - Great Crested Grebe 13, White Stork 2 + 2 young, Eurasian Spoonbill 1, Mute Swan 107, Common Shelduck 14 + 4 pulli, Eurasian Wigeon 1 female, Tufted Duck 1 female + 6 pulli, Common Buzzard 1, Eurasian Oystercatcher 2, Pied Avocet 8, Spotted Redshank 1 (summer plumage), Common Redshank 2, Lesser Black-backed Gull 30, Common Tern 50 + 2 pulli, Common Swift 100, Sand Martin 20, Barn Swallow 50, Common House Martin 60, Marsh Warbler 2, Black Swan 2.
Meeslouwerplas: Mute Swan 32, Common Buzzard 2, Common Cuckoo 1.
Leidschendammerhout: White Stork 2 + 1 young, Common Shelduck 4, Common Buzzard 1, Stock Dove 4, Rose-ringed Parakeet 3, Common Cuckoo 1, Song Thrush 3, Marsh Warbler 2, Common Reed Bunting 2.
Vlietland: Marsh Warbler 5.
Passing: Barnacle Goose 2.
June 8 - Great Egret 1, Mute Swan 110, Eurasian Wigeon 1, Black-tailed Godwit 2.
June 6 - Great Crested Grebe 14, Great Egret 1, White Stork 1 + 2 young, Mute Swan 107, Egyptian Goose 11, Common Shelduck 13, Eurasian Wigeon 2, Common Pochard 23 + 1 pul, Eurasian Oystercatcher 7, Pied Avocet 5, Common Redshank 2, Lesser Black-backed Gull 52, Common Tern 55, Marsh Warbler 1, Common Whitethroat 1, Black Swan 2.
Meeslouwerplas: Common Cuckoo 1.
Leidschendammerhout: White Stork 1 + 1 young, Common Buzzard 1, Marsh Warbler 2, Common Reed Bunting 2.
June 5 - Eurasian Wigeon 2, Northern Pintail 1 male, Red-crested Pochard 1 male, Pied Avocet 5, Common Tern 28, Black Swan 2.
June 4 - Great Crested Grebe 13, White Stork 1 + 2 young, Mute Swan 116, Common Shelduck 12, Eurasian Wigeon 3, Northern Pintail 1 male, Western Marsh Harrier 1 female, Eurasian Oystercatcher 4, Pied Avocet 9, Black-tailed Godwit 3, Common Redshank 1, Lesser Black-backed Gull 31, Common Tern 56, Common Cuckoo 1, Common House Martin 10, White Wagtail 1, Bluethroat 1, Sedge Warbler 5, Black Swan 1.
Meeslouwerplas: Mute Swan 55, Common Cuckoo 1.
Leidschendammerhout: White Stork 2 + 1 young, Common Cuckoo 1, Marsh Warbler 3, Common Reed Bunting 3.
June 3 - Eurasian Wigeon 2, Pied Avocet 4, Common Redshank 3, Common Cuckoo 2, Barn Swallow 10, Common House Martin 10, Black Swan 2.
June 1 - Great Crested Grebe 17, White Stork 1 + 1 young, Eurasian Spoonbill 1, Mute Swan 155, Common Shelduck 7 + 10 pulli, Western Marsh Harrier 1 male, Eurasian Oystercatcher 5, Pied Avocet 6, Common Redshank 1, Lesser Black-backed Gull 56, Common Tern 55, Black Swan 2.
Meeslouwerplas: Common Kingfisher 2.
Leidschendammerhout: White Stork 1 + 1 young, Rose-ringed Parakeet 3, Great Spotted Woodpecker 1, Song Thrush 4, Marsh Warbler 1, Common Reed Bunting 1.
Passing: Black-tailed Godwit 38, Whimbrel 1, Rose-ringed Parakeet 1.

May 28 - Great Crested Grebe 6, Mute Swan >50, Common Shelduck 16, Eurasian Wigeon 1 male 1 female, Eurasian Sparrowhawk 1, Common Buzzard 2, Eurasian Coot >30, Pied Avocet 6, Common Redshank 2, Common Sandpiper 1, Common Tern >30, Common Cuckoo 1, Common Swift 6, Barn Swallow >25, Common House Martin 3, Common Reed Bunting 5.
Meeslouwerplas: Long-tailed Tit 6.
Leidschendammerhout: White Stork 1, Marsh Warbler 3, Common Whitethroat 1, Blackcap 6.
May 25 - Great Crested Grebe 14, Red-necked Grebe 1, White Stork 1, Mute Swan 187, Greylag Goose 70, Egyptian Goose 2, Common Shelduck 5, Eurasian Wigeon 3, Eurasian Oystercatcher 3, Pied Avocet 6, Northern Lapwing 9, Black-tailed Godwit 2, Common Redshank 2, Lesser Black-backed Gull 33, Common Tern 60, Common Kingfisher 1.
Leidschendammerhout: White Stork 2 + 1 pul, Common Cuckoo 1 male 1 female, Song Thrush 5, Sedge Warbler 2, Marsh Warbler 1, Garden Warbler 1, Common Reed Bunting 4.
Passing: White Stork 3, Northern Goshawk 2, Common Buzzard 6, Peregrine Falcon 1, Great Spotted Woodpecker 1.
May 22 - Red-necked Grebe 1, Eurasian Spoonbill 2, Mute Swan 200, Gadwall >60, Pied Avocet 5, Common Tern >20, Bluethroat 1 with young, Sedge Warbler 15, Marsh Warbler 3, European Reed Warbler 20, Common Whitethroat 1, Blackcap 2, European Goldfinch 2, Common Reed Bunting >5, Black Swan 2.
May 21 - Great Crested Grebe 15, Red-necked Grebe 1, Black-necked Grebe 1, Mute Swan 204, Egyptian Goose 7, Common Shelduck 5 + 8 pulli, Eurasian Wigeon 2, Gadwall 135, Red-crested Pochard 1 male 1 female, Eurasian Oystercatcher 4, Pied Avocet 5, Lesser Black-backed Gull 31, Common Tern 85, Common Whitethroat 2, Black Swan 2.
Meeslouwerplas: Tawny Owl 1 calling.
Leidschendammerhout: White Stork 1, Common Shelduck 3, Rose-ringed Parakeet 1, Song Thrush 3, Sedge Warbler 1, Blackcap 6, Common Reed Bunting 1.
Passing: White Stork 1.
May 18 - Great Crested Grebe 16, Red-necked Grebe 1, Great Cormorant 6, Eurasian Spoonbill 1, Mute Swan 194, Greylag Goose 70, Common Shelduck 4, Eurasian Wigeon 2, Gadwall 130, Red-crested Pochard 2 male, Eurasian Oystercatcher 5, Pied Avocet 4, Common Redshank 1, Common Sandpiper 1, Lesser Black-backed Gull 35, Common Tern 65, Black Tern 1, Common Cuckoo 1, Common Kingfisher 1.
Meeslouwerplas: Common Cuckoo 1.
Leidschendammerhout: Common Cuckoo 1.
May 17 - Little Gull 1.
May 16 - Great Crested Grebe >20, Red-necked Grebe 1, Great Cormorant 3, Little Egret 1, Grey Heron 1, White Stork 4, Mute Swan >200, Greylag Goose >50, Egyptian Goose 6, Common Shelduck 6, Eurasian Wigeon 2, Gadwall >25, Northern Shoveler 5, Tufted Duck >25, Common Buzzard 2, Peregrine Falcon 1, Eurasian Coot >35, Eurasian Oystercatcher 3, Pied Avocet 2, Common Redshank 2, Common Sandpiper 3, Black-headed Gull >100, Lesser Black-backed Gull 6, Great Black-backed Gull 2, Common Tern >50, Common Cuckoo 1, Common Swift >35, Barn Swallow >100, Common House Martin >20, Common Grasshopper Warbler 2, Sedge Warbler >12, Blackcap 2, Northern Chiffchaff >10, Willow Warbler >10, Common Reed Bunting >15, Black Swan 2.
Meeslouwerplas: Black-necked Grebe 1.
Vlietland: Canada Goose 5+4 young, Sand Martin >10, Long-tailed Tit 1.
May 13 - Great Crested Grebe 16, Red-necked Grebe 1, Black-necked Grebe 3, Mute Swan 185, Eurasian Oystercatcher 2, Pied Avocet 2, Common Redshank 1, Common Sandpiper 6, Lesser Black-backed Gull 27, Common Tern 60, Common Whitethroat 2.
Leidschendammerhout: White Stork 1, Greylag Goose 130, Common Shelduck 2, Common Cuckoo 2 male.
Passing: White Stork 4.
May 11 - Red-necked Grebe 1, Black-necked Grebe 6, Mute Swan 187, Gadwall 114, Red-crested Pochard 2 male, Pied Avocet 4, Black-tailed Godwit 2, Common Sandpiper 15, Bluethroat 1 singing, Lesser Whitethroat 1.
May 10 - Great Crested Grebe 21, Red-necked Grebe 1, Black-necked Grebe 5, Mute Swan 223, Common Shelduck 4, Eurasian Wigeon 3, Gadwall 131, Tufted Duck 65, Eurasian Oystercatcher 4, Pied Avocet 2, Black-tailed Godwit 1, Common Redshank 2, Common Sandpiper 8, Lesser Black-backed Gull 32, Common Tern 70, Common Kingfisher 1, Bearded Reedling 1 male.
Leidschendammerhout: White Stork 1, Common Kestrel 1, Rose-ringed Parakeet 1, Common Cuckoo 1, Sedge Warbler 2, Common Whitethroat 1.
May 8 - Red-necked Grebe 1, Black-necked Grebe 2, Mute Swan 197, Common Sandpiper 7, Black Tern 1.
Passing: Eurasian Spoonbill 1.
May 7 - Great Crested Grebe >25, Red-necked Grebe 1, Great Cormorant 12, Grey Heron 2, White Stork 1, Mute Swan 116, Egyptian Goose >15, Common Shelduck 7, Eurasian Wigeon 2, Red-crested Pochard 1 male, Common Pochard 4, Tufted Duck >20, Eurasian Oystercatcher >10, Pied Avocet 2, Black-tailed Godwit 1, Common Redshank 1, Common Sandpiper 8, Mediterranean Gull 2, Lesser Black-backed Gull 32, Common Tern 70, Black Tern 3, Stock Dove 1, Common Cuckoo 1, European Reed Warbler >15, Blackcap 6, Spotted Flycatcher 1.
May 6 - Caspian Tern 1 (on shell island).

Caspian Tern, 6-5-2016 (Photo © Wim Verhagen)

April 30 - Great Crested Grebe 18, Red-necked Grebe 1, Black-necked Grebe 1, White Stork 1, Eurasian Spoonbill 1, Mute Swan 30, Eurasian Wigeon 6, Red-crested Pochard 2 male, Common Kestrel 1, Eurasian Oystercatcher 5, Black-tailed Godwit 2, Mediterranean Gull 2, Lesser Black-backed Gull 34, Common Tern 110, Common Cuckoo 1, Common Swift 35, Barn Swallow 30, Common House Martin 40.
Meeslouwerplas: Gadwall 130, Common Cuckoo 1 male, Common Nightingale 1, Garden Warbler 1.
Leidschendammerhout: White Stork 4, Common Kestrel 1, Sedge Warbler 3.
April 29 - Red-necked Grebe 1, Pied Avocet 6, Common Redshank 1, European Reed Warbler 1.
Meeslouwerplas: Red-crested Pochard 3 male 2 female.
April 28 - Great Crested Grebe 15, Red-necked Grebe 1, Black-necked Grebe 3, Eurasian Spoonbill 1, Eurasian Wigeon 4, Common Teal 5, Northern Goshawk 1, Common Kestrel 1, Eurasian Oystercatcher 7, Common Redshank 3, Common Sandpiper 1, Mediterranean Gull 4, Little Gull 3, Common Tern 65, Black Tern 2, Common Swift 30, Sand Martin 10, Barn Swallow 40, Common House Martin 45, Sedge Warbler 12, Common Whitethroat 2, Blackcap 3.
Passing: White Stork 2, Eurasian Hobby 1.
April 24 - Red-necked Grebe 1, Red-crested Pochard 2 male 2 female, Eurasian Sparrowhawk 1 female, Little Gull 1, Common Tern 10, Black Tern 10 (shortly present), Common Swift 3, Common Kingfisher 1, Bluethroat 2, Common Whitethroat 1 male 1 female.
April 23 - Eurasian Hobby 2 (hunting swallows), Common Tern 120, Black Tern 2, Common Grasshopper Warbler 1.
Meeslouwerplas: Common Cuckoo flying over.
April 22 - Red-necked Grebe 1, Northern Pintail 2, Red-crested Pochard 2, Black-tailed Godwit 3, Little Gull >50, Yellow-legged Gull 1, Black Tern 4, Common Swift 10, Sand Martin 1, Barn Swallow 5, Common House Martin 5.
April 21 - Great Crested Grebe 16, Red-necked Grebe 1, White Stork 1, Greylag Goose 45, Common Shelduck 9, Eurasian Wigeon 5, Common Teal 9, Northern Pintail 1 male, Red-crested Pochard 2 male 1 female, Eurasian Oystercatcher 15, Black-tailed Godwit 5, Common Redshank 1, Common Greenshank 2, Little Gull 2, Lesser Black-backed Gull 37, Common Tern 60.
April 20 - Red-necked Grebe 1, White Stork 2, Eurasian Wigeon 3, Northern Pintail 1 male, Jack Snipe 1 (NW-side), Spotted Redshank 2, Common Redshank 3, Little Gull 2 adult 1 2cy, Common Tern 340, Sand Martin 50, Barn Swallow 20, White Wagtail 1, Common Grasshopper Warbler 2, Long-tailed Tit 2.
Meeslouwerplas: Western Marsh Harrier 2 female, Common Grasshopper Warbler 1, Savi's Warbler 1.
Spekpolder: Red-crested Pochard 3 male 1 female.
Passing: Little Ringed Plover 1, Whimbrel 28 NE, Common Swift 1 NE.
April 19 -
Rietpolder: Great Northern Loon 1.
Passing: Common Swift 10.
April 18 - Red-necked Grebe 1, White Stork 1, Barnacle Goose 1, Common Shelduck 4, Eurasian Wigeon 13, Common Teal 15, Northern Pintail 1 male, Red-crested Pochard 4 male 2 female, Eurasian Oystercatcher 41, Pied Avocet 3, Little Ringed Plover 1, Black-tailed Godwit 31, Common Redshank 1, Mediterranean Gull 2, Little Gull 7, Lesser Black-backed Gull 34, Common Tern 250, Barn Swallow 50, Common House Martin 15, Common Grasshopper Warbler 2, Sedge Warbler 15, Common Whitethroat 1.
Rietpolder: Great Spotted Woodpecker 1, Common Nightingale 1.
Spekpolder: Great Northern Loon 1.
Passing: White Stork 2.
April 17 - Red-necked Grebe 1, Common Teal 17, Red-crested Pochard 2 male, Western Marsh Harrier 1 male, Icelandic Black-tailed Godwit 25, Black-tailed Godwit 31, Mediterranean Gull 2, Little Gull 2, Sand Martin 10, Barn Swallow 65, Common House Martin 15, Blue-headed Wagtail 1, Common Grasshopper Warbler 1, Savi's Warbler 1, Common Whitethroat 1, Blackcap 2, Short-toed Tree Creeper 1.
Meeslouwerplas: Eurasian Sparrowhawk 1 male, Water Rail 1, Common Nightingale 2, Blackcap 8, European Pied Flycatcher 1 female, Short-toed Tree Creeper 2.
Rietpolder: Great Northern Loon 1, Red-crested Pochard 2 male 3 female.
April 14 - Great Crested Grebe 14, Red-necked Grebe 1, Black-necked Grebe 2, White Stork 2, Greylag Goose 2 + 15 pulli, Common Shelduck 6, Eurasian Wigeon 8, Common Teal 5, Northern Pintail 1 male, Red-crested Pochard 3, Common Goldeneye 1 female, Eurasian Oystercatcher 42, Black-tailed Godwit 29, Little Gull 2 adult, Lesser Black-backed Gull 30, Common Tern 32, Black Tern 1, Common Kingfisher 1.
Spekpolder: Great Northern Loon 1.
Leidschendammerhout: Great Egret 1, White Stork 2, Rose-ringed Parakeet 1.
April 13 - Red-necked Grebe 1, Greater White-fronted Goose 1, Northern Pintail 1 male, Garganey 1 male 1 female, Red-crested Pochard 1 male, Common Goldeneye 1 male 3 female, Common Tern 5, Sedge Warbler 1, Red-eared Slider 1.
Rietpolder: Common Nightingale 1.
Spekpolder: Great Northern Loon 1, Common Nightingale 1.
Leidschendammerhout: White Stork 3, Bluethroat 1, Sedge Warbler 1, Common Reed Bunting 1.
April 12 - Great Crested Grebe 20, Red-necked Grebe 1, Great Cormorant 9, Greylag Goose 2 + 8 pulli, Common Shelduck 15, Eurasian Wigeon 27, Common Teal 5, Garganey 1 male 1 female, Red-crested Pochard 1 male, Common Goldeneye 1 male 4 female, Common Buzzard 1, Eurasian Oystercatcher 29, Pied Avocet 4, Black-tailed Godwit 120, Bar-tailed Godwit 1, Common Redshank 2, Mediterranean Gull 1 adult 1 3cy (cr-ringed), Lesser Black-backed Gull 22, Bluethroat 1, Black Swan 2.
Spekpolder: Great Northern Loon 1.
Leidschendammerhout: White Stork 4, Common Buzzard 3, Pied Avocet 1, Rose-ringed Parakeet 1, Great Spotted Woodpecker 1.
April 11 - Red-necked Grebe 1, Dark-bellied Brent Goose 1, Mediterranean Gull 4.
Spekpolder: Great Northern Loon 1 (in the morning fish line was removed).
Passing: Great Cormorant 52 NE, Ruff 5.
April 10 - Red-necked Grebe 1, White Stork 3, Glossy Ibis 2, Common Goldeneye 12, Western Marsh Harrier 1 male, Common Buzzard 6, Common Redshank 2, Barn Swallow 1, Bluethroat 2, Sedge Warbler 2, Willow Warbler 1.
Spekpolder: Great Northern Loon 1 (caught up in fish line).
Passing: Barnacle Goose 22, Peregrine Falcon 2.
April 9 - Great Crested Grebe 23, Red-necked Grebe 1, White Stork 2, Glossy Ibis 2, Mute Swan 3, Common Shelduck 46, Eurasian Wigeon 12, Common Teal 8, Northern Pintail 1 male, Common Goldeneye 5 male 5 female, Common Kestrel 2, Eurasian Oystercatcher 120, Black-tailed Godwit 170, Spotted Redshank 1, Common Redshank 2, Lesser Black-backed Gull 22, Great Black-backed Gull 2.
Meeslouwerplas: Little Grebe 1, Great Crested Grebe 13, Canada Goose 2, Gadwall 28, Water Rail 1, Common Kingfisher 1.
Spekpolder: Great Northern Loon 1.
Passing: White Stork 1, Common Buzzard 1.
April 8 - Red-necked Grebe 1, Glossy Ibis 3, Common Snipe 1, Common Tern 1, Bluethroat 2, Sedge Warbler 1.
Meeslouwerplas: Blackcap 2.
April 7 - Little Grebe 1, Great Crested Grebe 14, Red-necked Grebe 1, Glossy Ibis 3, Common Shelduck 64, Eurasian Wigeon 15, Common Teal 7, Northern Shoveler 329, Red-crested Pochard 1 male 1 female, Common Goldeneye 4 male 7 female, Western Marsh Harrier 2 male, Eurasian Oystercatcher 125, Common Snipe 2, Black-tailed Godwit 110, Spotted Redshank 1, Lesser Black-backed Gull 9, Great Black-backed Gull 2, Sedge Warbler 3.
Meeslouwerplas: Common Redshank 3.
Passing: Eurasian Spoonbill 1 SW, Eurasian Sparrowhawk 1 female S.
April 5 - Little Grebe 3, Red-necked Grebe 1, White Stork 3, Glossy Ibis 1, Common Shelduck 58, Common Teal 7, Northern Pintail 3, Red-crested Pochard 2 male 1 female, Common Goldeneye 3 male 5 female, Western Marsh Harrier 1 2cy male, Common Kestrel 2, Eurasian Oystercatcher 120, Icelandic Black-tailed Godwit 10, Black-tailed Godwit 170, Spotted Redshank 1, Common Redshank 2, Lesser Black-backed Gull 18, Common Tern 1, Sand Martin 2, Bluethroat 2.
Meeslouwerplas: Great Crested Grebe 11, Blackcap 1, Northern Chiffchaff 6, Willow Warbler 3.
Spekpolder: Great Northern Loon 1, Great Crested Grebe 17, Canada Goose 7, Egyptian Goose 6, Eurasian Oystercatcher 35, Lesser Black-backed Gull 9.
Leidschendammerhout: Great Egret 2, White Stork 3, Northern Chiffchaff 5, Willow Warbler 1.
April 3 - Red-necked Grebe 1, Glossy Ibis 3, Northern Pintail 1 male, Northern Goshawk 1, Pied Avocet 2, Common Snipe 7, Black-tailed Godwit 69, Bluethroat 3, Sedge Warbler 3, Bearded Reedling 2.
Meeslouwerplas: Blackcap 2, Northern Chiffchaff >10, Willow Warbler 8, Firecrest 1 singing.
Rietpolder: Great Northern Loon 1.
April 2 - Little Grebe 2, Great Crested Grebe 14, Red-necked Grebe 1 summer plumage, White Stork 1, Glossy Ibis 3, Common Shelduck 39, Common Teal 17, Northern Pintail 1, Common Goldeneye 4 male 4 female, Eurasian Sparrowhawk 1, Peregrine Falcon 1 hunting, Eurasian Oystercatcher 110, Pied Avocet 2, Icelandic Black-tailed Godwit 2, Black-tailed Godwit 260, Spotted Redshank 1, Common Redshank 2, Lesser Black-backed Gull 23, Common Kingfisher 2, Bluethroat 5 male 2 female, Sedge Warbler 10, Northern Chiffchaff 12, Willow Warbler 5.
Meeslouwerplas: Great Crested Grebe 11, Common Redshank 7, Northern Chiffchaff 6, Willow Warbler 1.
Rietpolder: Great Northern Loon 1, Little Grebe 1, Great Crested Grebe 15, Red-necked Grebe 1, Red-crested Pochard 1 male, Common Kingfisher 1.
Leidschendammerhout: Great Egret 2, White Stork 4, Eurasian Spoonbill 1, Rose-ringed Parakeet 1, Great Spotted Woodpecker 1, Northern Chiffchaff 5.

March 31 - Little Grebe 3, Great Crested Grebe 15, Black-necked Grebe 1, White Stork 2, Glossy Ibis 3, Canada Goose 7, Common Shelduck 34, Eurasian Wigeon 650, Common Teal 2, Northern Pintail 1, Northern Shoveler 190, Common Goldeneye 3 male 4 female, Eurasian Oystercatcher 120, Black-tailed Godwit 250, Spotted Redshank 1, Lesser Black-backed Gull 29, Barn Swallow 2, Bluethroat 3, Sedge Warbler 2, Common Reed Bunting 4.
Meeslouwerplas: Great Crested Grebe 14, Greylag Goose 90, Canada Goose 4, Egyptian Goose 2, Red-crested Pochard 2 male 1 female, Northern Chiffchaff 3.
Spekpolder: Great Northern Loon 1, Little Grebe 2, Great Crested Grebe 8, Red-necked Grebe 1, Common Kestrel 1.
Leidschendammerhout: White Stork 4 (2 artificial nests), Northern Chiffchaff 5.
Passing: Eurasian Sparrowhawk 1, Common Buzzard 5, Peregrine Falcon 2.
March 30 - Black-necked Grebe 1, Glossy Ibis 3, Red-crested Pochard 1 male 1 female, Common Goldeneye 5, Eurasian Curlew 400, Spotted Redshank 1, Common Redshank 8, Common Kingfisher 1, Bluethroat 2.
Meeslouwerplas: Sedge Warbler 1.
Passing: Little Egret 1 N, Northern Goshawk 2, Barn Swallow 2, Water Pipit 1.
March 29 - Great Crested Grebe 13, Black-necked Grebe 1, Glossy Ibis 3, Common Shelduck 5, Northern Pintail 5, Northern Shoveler 54, Common Goldeneye 4 male 6 female, Eurasian Sparrowhawk 1, Common Buzzard 2, Eurasian Oystercatcher 145, Dunlin 1, Common Snipe 25, Black-tailed Godwit 320, Common Redshank 3, Water Pipit 2, Bluethroat 1.
Meeslouwerplas: Little Grebe 5, Great Crested Grebe 10, Mute Swan 2, Western Marsh Harrier 1, Common Redshank 13, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Little Grebe 6, Red-crested Pochard 2 male 1 female.
Leidschendammerhout: Great Egret 3, White Stork 2, Common Buzzard 3.
Passing: Eurasian Spoonbill 1.
March 28 - Glossy Ibis 2, Icelandic Black-tailed Godwit 5, Black-tailed Godwit 100, Bearded Reedling 2 male 1 female.
March 27 - Common Goldeneye 3, Northern Goshawk 1, Eurasian Sparrowhawk 1, European Golden Plover 3, Black-tailed Godwit 160, Common Redshank 8, Redwing 32.
Rietpolder: Great Northern Loon 1.
Spekpolder: Red-necked Grebe 1.
March 26 - Horned Grebe 1, Great Cormorant 4, Grey Heron 2, White Stork 2, Glossy Ibis 3, Mute Swan 6, Canada Goose 8, Barnacle Goose 7, Common Shelduck 30, Eurasian Wigeon 2300, Northern Pintail 8, Northern Shoveler >40, Common Pochard 5, Tufted Duck >50, Common Goldeneye 5 male 7 female, Western Marsh Harrier 1 male, Common Buzzard 1, Common Moorhen 3, Eurasian Oystercatcher 160, Pied Avocet 2, Black-tailed Godwit 290, Common Redshank 3, Lesser Black-backed Gull 23, Great Black-backed Gull 1 3cy, White Wagtail 1, Common Reed Bunting 7.
Meeslouwerplas: Little Grebe 3, Great Crested Grebe 16, Western Marsh Harrier 1 female, Water Rail 2, Common Redshank 5, Common Stonechat 1 female, Northern Chiffchaff 3, Long-tailed Tit 2.
Rietpolder: Great Northern Loon 1, Common Kingfisher 1.
Vlietland: Northern Chiffchaff 2.
Passing: Western Marsh Harrier 1.
March 25 -
Rietpolder: Black-necked Grebe 2.
March 24 - Little Grebe 2, Great Egret 1, White Stork 2, Glossy Ibis 3, Eurasian Spoonbill 1, Common Shelduck 37, Eurasian Wigeon >3500, Northern Pintail 6 male 4 female, Common Goldeneye 5 male 6 female, Northern Goshawk displaying, Eurasian Sparrowhawk 1 female, Common Buzzard 1, Water Rail 1, Eurasian Oystercatcher 145, Pied Avocet 1, Ruff 3, Common Snipe 3, Black-tailed Godwit 240, Common Redshank 4, Mediterranean Gull 1 adult summer plumage (shortly present at 5 PM), Lesser Black-backed Gull 10, Great Black-backed Gull 1 adult 3 3cy, Barn Swallow 3, Northern Chiffchaff 1.
Meeslouwerplas: Great Crested Grebe 10, Common Buzzard 2, Water Rail 3, Common Redshank 9, Common Kingfisher 2, Winter Wren 10, Song Thrush 3.
Rietpolder: Great Northern Loon 1, Little Grebe 8, Black-necked Grebe 1, Northern Goshawk 1 (calling).
Leidschendammerhout: Great Egret 1, White Stork 3, Northern Pintail 5, Common Buzzard 1.
Passing: White Stork 2, Redwing 30, Eurasian Siskin 15.
March 21 - Great Cormorant 12, Glossy Ibis 3, Common Shelduck 51, Eurasian Wigeon 5800, Northern Pintail 5 male 3 female, Common Goldeneye 5 male 5 female, Eurasian Oystercatcher 140, Ruff 2, Black-tailed Godwit 165, Common Redshank 3, Lesser Black-backed Gull 11.
Meeslouwerplas: Great Crested Grebe 11, Mute Swan 2, Eurasian Sparrowhawk 1, Water Rail 1, Common Redshank 3.
Rietpolder: Great Northern Loon 1, Common Kingfisher 1.
Leidschendammerhout: Great Egret 2, White Stork 2, Eurasian Spoonbill 2.
Vlietland: Little Grebe 10, Great Crested Grebe 15, Eurasian Oystercatcher 60.
Passing: Eurasian Spoonbill 1, Common Buzzard 4, Black-tailed Godwit 9, Rose-ringed Parakeet 1.
March 20 - Little Grebe 2, White Stork 2, Glossy Ibis 3, Common Buzzard 1, Common Kestrel 1, Black-tailed Godwit 30, Common Redshank 3, Great Black-backed Gull 1, White Wagtail 3.
Rietpolder: Great Northern Loon 1.
Passing: Redwing 18.
March 19 - White Stork 2, Glossy Ibis 3, Greater White-fronted Goose 330, Greylag Goose 48, Canada Goose 31, Barnacle Goose 99, Common Shelduck 56, Northern Pintail 5, Common Pochard 70, Common Goldeneye 6 male 4 female, Smew 1 female, Common Buzzard 3, Water Rail 1, Eurasian Oystercatcher 130, Pied Avocet 1, Black-tailed Godwit 150, Common Redshank 2, Lesser Black-backed Gull 60, Great Black-backed Gull 1, White Wagtail 1, Cetti's Warbler 1 singing.
Meeslouwerplas: Great Egret 21, Greylag Goose 184, Canada Goose 23, Egyptian Goose 6, Common Shelduck 2, Common Goldeneye 1 male 1 female, Smew 1 female, Water Rail 2, Water Pipit 4, White Wagtail 2.
Rietpolder: Great Northern Loon 1, Greylag Goose 25, Eurasian Sparrowhawk 1, Eurasian Siskin 4.
Spekpolder: Red-necked Grebe 1, Barnacle Goose 1.
Leidschendammerhout: Great Egret 1, White Stork 2, Eurasian Spoonbill 1, Mute Swan 9, Gadwall 49, Common Teal 16, Mallard 15, Northern Pintail 6, Common Buzzard 4, Peregrine Falcon 1, Water Pipit 2, White Wagtail 3, Redwing 20.
Passing: White Stork 6, White Wagtail 3 NE, Common Starling 200, European Serin 1.
March 18 - Great Crested Grebe 8, Great Cormorant 6, Grey Heron 2, Glossy Ibis 3, Mute Swan 3, Common Shelduck 28, Eurasian Wigeon >3000, Northern Pintail 3 male, Common Goldeneye 6 male 4 female, Common Buzzard 5, Eurasian Oystercatcher >40, Pied Avocet 1, Black-tailed Godwit >75, Northern Chiffchaff 1, Common Reed Bunting 3.
Meeslouwerplas: Little Grebe 2, Red-crested Pochard 3 male, Common Scoter 3 male, Water Rail 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Red-necked Grebe 1, Northern Goshawk 1 hunting, Redwing 80.
March 17 - Great Crested Grebe 14, Horned Grebe 1, Great Cormorant 14, Great Egret 1, Glossy Ibis 3, Common Shelduck 53, Eurasian Wigeon >3000, Northern Pintail 4 male 1 female, Common Goldeneye 4 male 5 female, Smew 1 female, Eurasian Oystercatcher 98, Pied Avocet 1, Black-tailed Godwit 215, Common Redshank 1, Lesser Black-backed Gull 15, Fieldfare 2.
Meeslouwerplas: Little Grebe 4, Red-necked Grebe 1, Water Rail 1.
Spekpolder: Great Northern Loon 1.
Leidschendammerhout: Great Egret 2, White Stork 3, Northern Pintail 1, Common Buzzard 1.
Vlietland: Little Grebe 12, Great Crested Grebe 23, Eurasian Oystercatcher 55.
March 15 - Little Grebe 1, Great Crested Grebe 28, Horned Grebe 1, Black-necked Grebe 2, Great Egret 1, Glossy Ibis 1, Common Shelduck 59, Mandarin Duck 1 male 1 female (shortly present in front of the hide; flew off to SE), Eurasian Wigeon 3400, Common Teal 2, Northern Pintail 2, Common Goldeneye 5 male 6 female, Smew 1 male 2 female, Hen Harrier 1, Eurasian Oystercatcher 85, Common Snipe 16, Black-tailed Godwit 68, Lesser Black-backed Gull 18.
Meeslouwerplas: Little Grebe 4, Great Crested Grebe 11, Mute Swan 2, Canada Goose 7.
Rietpolder: Great Northern Loon 1, Little Grebe 5, Great Crested Grebe 15, Red-necked Grebe 1, Common Buzzard 1, Eurasian Oystercatcher 70.
Leidschendammerhout: Great Egret 1, White Stork 2, Eurasian Spoonbill 1, Northern Pintail 1, Tufted Duck 15, Song Thrush 2, Common Reed Bunting 1.
Passing: White Stork 1, Common Pochard 6 male 1 female, Ruff 9, Water Pipit 1, Eurasian Siskin 1 N.
March 14 - Glossy Ibis 3, Common Goldeneye 4, Black-tailed Godwit 20.
Meeslouwerplas: Red-necked Grebe 1, Horned Grebe 1, Common Pochard 7, Redwing 6, Northern Chiffchaff 1.
Spekpolder: Great Northern Loon 1.
March 13 - Great Egret 1, White Stork 1, Glossy Ibis 3, Mute Swan 3, Greater White-fronted Goose 2, Canada Goose 3, Common Shelduck 26, Eurasian Wigeon 850, Northern Pintail 2 male 1 female, Common Pochard 8, Common Goldeneye 3 male, Smew 1 male 2 female, Common Buzzard 1, Water Rail 1, Black-tailed Godwit 120, Bearded Reedling 1 female.
Meeslouwerplas: Little Grebe 3, Red-necked Grebe 1, Red-crested Pochard 1 male 1 female, Common Kingfisher 1 male 1 female, Northern Chiffchaff 2.
Rietpolder: Ferruginous Duck 1 male (amongst Common Pochards).
March 12 - White Stork 4, Common Goldeneye 1, Smew 1, Common Buzzard 4, Pied Avocet 1, European Greenfinch 6.
Meeslouwerplas: Little Grebe 8, Horned Grebe 1.
March 10 - Great Bittern 1, Great Egret 1, Glossy Ibis 3, Common Shelduck 27, Eurasian Wigeon 2200, Common Teal 4, Northern Pintail 3 male 3 female, Common Goldeneye 4 male 5 female, Smew 1 male 2 female, Eurasian Oystercatcher 175, Black-tailed Godwit 115, Lesser Black-backed Gull 10, Great Black-backed Gull 1 3cy.
Meeslouwerplas: Red-necked Grebe 1, Horned Grebe 1.
Spekpolder: Great Northern Loon 1.
Leidschendammerhout: Great Egret 2, White Stork 2, Common Buzzard 1.
Vlietland: Little Grebe 8.
Passing: Greater White-fronted Goose 120, Northern Goshawk 1.
March 9 - Glossy Ibis 3, Eurasian Spoonbill 1, Common Goldeneye 2 male 4 female, Smew 1 male 2 female, Common Snipe 4, Black-tailed Godwit 72, Common Redshank 2, Bearded Reedling 1, Common Reed Bunting 1.
Meeslouwerplas: Little Grebe 5, Horned Grebe 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Red-necked Grebe 1.
Leidschendammerhout: White Wagtail 3.
Passing: Eurasian Skylark 1, Eurasian Siskin 4.
March 8 - White Stork 2, Glossy Ibis 3, Common Shelduck 20, Common Goldeneye 4 male 5 female, Smew 1 male 1 female, Northern Goshawk 1 immature, Common Buzzard 1, Eurasian Oystercatcher 173, Common Snipe 3, Black-tailed Godwit 114, Lesser Black-backed Gull 10.
Meeslouwerplas: Little Grebe 6, Horned Grebe 1, Common Buzzard 1, Water Rail 2.
Rietpolder: Great Northern Loon 1.
Leidschendammerhout: Great Egret 2, White Stork 2, Northern Pintail 2, Tufted Duck 21, Common Buzzard 2.
March 7 - Great Egret 1, Glossy Ibis 3, Common Goldeneye 2 male 1 female, Water Rail 1, Dunlin 1, Common Snipe 4, Black-tailed Godwit 100, Icelandic Black-tailed Godwit 15, Bearded Reedling 2 female, Common Reed Bunting 3.
Meeslouwerplas: Little Grebe 2, Eurasian Spoonbill 6.
Rietpolder: Great Northern Loon 1, Northern Goshawk 1, Peregrine Falcon 1.
March 6 - Great Bittern 1, Grey Heron 4, White Stork 2, Glossy Ibis 3, Mute Swan 6, Greater White-fronted Goose 2500, Common Shelduck 13, Common Goldeneye 8 male 7 female, Common Buzzard 2, Water Rail 2, Black-tailed Godwit 30, Common Kingfisher 3, Fieldfare 21, Long-tailed Tit 4, European Goldfinch 4.
Meeslouwerplas: Little Grebe 5, Red-necked Grebe 1, Great Egret 34, Eurasian Spoonbill 3, Water Rail 1, Water Pipit 38, Northern Chiffchaff 1, Eurasian Siskin 1.
Rietpolder: Great Northern Loon 1, Little Grebe 1, Common Kestrel 1, European Goldfinch 2.
Leidschendammerhout: Common Teal 8.
Vlietland: Northern Goshawk 2.
Passing: Common Starling 350 NE, Eurasian Siskin 24.
March 5 - Little Grebe 1, Great Cormorant 6, Great Egret 1, Grey Heron 2, White Stork 2, Glossy Ibis 3, Eurasian Spoonbill 1, Mute Swan 5, Tundra Bean Goose 1, Greater White-fronted Goose 1200, Greylag Goose 150, Canada Goose 14, Egyptian Goose 3, Common Shelduck 23, Eurasian Wigeon 2600, Gadwall 100, Common Teal 72, Tufted Duck 175, Common Goldeneye 3 male 6 female, Smew 1 male 1 female, Water Rail 1, Eurasian Oystercatcher 115, Pied Avocet 1, Northern Lapwing 100, Black-tailed Godwit 41, Lesser Black-backed Gull 14.
Meeslouwerplas: Little Grebe 4, Great Crested Grebe 16, Horned Grebe 1, Water Rail 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Red-necked Grebe 1.
Leidschendammerhout: Great Egret 2, White Stork 2, Common Teal 11, Northern Pintail 5, Common Buzzard 2, Eurasian Oystercatcher 2, Great Spotted Woodpecker 1, Song Thrush 5.
Passing: Greater White-fronted Goose 160, Peregrine Falcon 1.
March 4 - Eurasian Oystercatcher 70, Black-tailed Godwit 70, Icelandic Black-tailed Godwit 10.
Meeslouwerplas: Horned Grebe 1, Velvet Scoter 1.
Rietpolder: Great Northern Loon 1.
March 3 - Glossy Ibis 3, Smew 1, Black-tailed Godwit 24, Lesser Black-backed Gull 10.
Meeslouwerplas: Horned Grebe 1, Northern Goshawk 1.
Rietpolder: Red-necked Grebe 1.
Spekpolder: Eurasian Oystercatcher 155.
Passing: Tundra Bean Goose 10 N, Pink-footed Goose 30 N, Greater White-fronted Goose 200 N.
March 2 - Great Crested Grebe 11, Mute Swan 3, Common Shelduck 14, Common Goldeneye 4 male 7 female, Smew 1 male 1 female, Eurasian Oystercatcher 172, Black-tailed Godwit 32, Lesser Black-backed Gull 17, Fieldfare 15.
Meeslouwerplas: Great Crested Grebe 10, Water Rail 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Red-necked Grebe 1.
Leidschendammerhout: Great Egret 2, White Stork 2 (on artificial nest), Common Teal 7, Northern Pintail 5, Tufted Duck 14.
Vlietland: Great Northern Loon 1, Little Grebe 11, Great Crested Grebe 13, Common Buzzard 1, Eurasian Oystercatcher 120.

February 29 - Great Cormorant 17, Great Bittern 1, White Stork 2, Glossy Ibis 3, Mute Swan 7, Common Shelduck 18, Northern Pintail 3, Common Goldeneye 3 male 4 female, Smew 1 male 3 female, Eurasian Sparrowhawk 1, Eurasian Oystercatcher 116, Black-tailed Godwit 25, Lesser Black-backed Gull 9.
Meeslouwerplas: Red-necked Grebe 1, Horned Grebe 1.
Rietpolder: Great Northern Loon 1, Little Grebe 15.
Leidschendammerhout: Great Egret 2, White Stork 2, Common Teal 10, Northern Pintail 8, Common Buzzard 2, Redwing 2.
Passing: Eurasian Sparrowhawk 1 male.
February 28 - Little Grebe 1, Great Crested Grebe >10, Great Cormorant 7, Great Egret 3, Grey Heron 2, White Stork 2, Glossy Ibis 3, Egyptian Goose 4, Common Shelduck 12, Common Teal 12, Common Goldeneye 8, Smew 1 male 1 female, Northern Goshawk 1, Eurasian Sparrowhawk 1, Common Buzzard 2, Peregrine Falcon 1 male, Black-tailed Godwit 11, Common Kingfisher 1, Northern Chiffchaff 1, Common Reed Bunting 4.
Meeslouwerplas: Horned Grebe 1.
Rietpolder: Great Northern Loon 1, Little Grebe 5, Red-necked Grebe 1, Common Kestrel 1.
Leidschendammerhout: Great Egret 2, Mute Swan 2, Common Teal 4, Northern Pintail 8 male 4 female, Eurasian Sparrowhawk 1, Meadow Pipit 22, Common Stonechat 1.
February 27 - Common Shelduck 7, Common Goldeneye 8, Black-tailed Godwit 10.
Meeslouwerplas: Red-necked Grebe 1, Horned Grebe 1.
Vlietland: Great Northern Loon 1.
Passing: Bewick's Swan 11.
February 26 - Great Crested Grebe 13, Great Cormorant 7, Great Egret 1, Glossy Ibis 3, Common Shelduck 18, Common Teal 23, Common Goldeneye 3 male 5 female, Smew 1 male 1 female, Eurasian Oystercatcher 117, Black-tailed Godwit 8, Common Redshank 1, Lesser Black-backed Gull 7.
Meeslouwerplas: Horned Grebe 1.
Leidschendammerhout: Great Egret 2, Common Teal 15, Northern Pintail 4, Rose-ringed Parakeet 1.
Vlietland: Great Northern Loon 1, Red-necked Grebe 1.
Passing: Common Buzzard 2.
February 25 - Eurasian Spoonbill 1, Smew 1 male 1 female, Eurasian Oystercatcher 245.
Spekpolder: Little Grebe 5.
February 24 - Little Grebe 3, Great Crested Grebe 12, Great Bittern 1, White Stork 2, Glossy Ibis 3, Eurasian Spoonbill 3, Greater White-fronted Goose 1700, Egyptian Goose 6, Red-crested Pochard 3 male 1 female, Common Pochard 52 male 38 female, Common Goldeneye 3 male 1 female, Smew 1 male 2 female, Northern Goshawk 1, Common Buzzard 4, Common Kestrel 1, Water Rail 1, Eurasian Oystercatcher 85, Common Snipe 2, Black-tailed Godwit 3, Cetti's Warbler 1 singing.
Meeslouwerplas: Great Egret 34, Greylag Goose 320, Eurasian Sparrowhawk 1, Water Rail 1, Common Kingfisher 1, Water Pipit 36, Northern Chiffchaff 1, Long-tailed Tit 2.
Rietpolder: Great Northern Loon 1, Little Grebe 5.
Spekpolder: Little Grebe 6, Red-necked Grebe 1, Red-crested Pochard 2 male 1 female, Eurasian Oystercatcher 225.
Passing: Eurasian Curlew 350.
February 23 - Horned Grebe 1, Glossy Ibis 3, Common Shelduck 7, Common Teal 14, Northern Pintail 3, Common Goldeneye 2 male 3 female, Smew 1 male 2 female, Eurasian Oystercatcher 159, Northern Lapwing 70, Common Snipe 6, Black-tailed Godwit 1, Lesser Black-backed Gull 14.
Leidschendammerhout: Little Egret 1, Great Egret 2, White Stork 2, Gadwall 21, Common Teal 7, Mallard 15, Northern Pintail 8 male 2 female, Eurasian Sparrowhawk 1, Common Buzzard 4.
February 22 - Glossy Ibis 3, Eurasian Spoonbill 3, Common Shelduck 6, Common Teal 103, Northern Pintail 3 male, Common Pochard 22, Common Goldeneye 2 male 4 female, Smew 1 male 2 female, Common Kestrel 1, Eurasian Oystercatcher 163, Common Snipe 4, Black-tailed Godwit 1, Lesser Black-backed Gull 4.
Meeslouwerplas: Little Grebe 4, Horned Grebe 1, Common Goldeneye 1 male, Water Rail 3, Common Kingfisher 1, Cetti's Warbler 1.
Rietpolder: Great Northern Loon 1.
Leidschendammerhout: Little Egret 1, Common Teal 15.
Passing: Northern Goshawk 1, Eurasian Sparrowhawk 1, Black-tailed Godwit 6 S, Eurasian Siskin 15.
February 21 - Glossy Ibis 3, Smew 1 female, Eurasian Oystercatcher 114, Pied Avocet 1, Eurasian Curlew 400, Common Kingfisher 1, White Wagtail 2, Pied Wagtail 1.
Meeslouwerplas: Horned Grebe 1, Little Egret 1, Great Egret 34, Common Goldeneye 3 male, Northern Goshawk 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Little Grebe 8, Long-tailed Tit 1.
Spekpolder: Little Grebe 1, Common Goldeneye 1 female, Eurasian Oystercatcher 140.
February 19 - White Stork 2, Mute Swan 1, Common Shelduck 8, Eurasian Wigeon >2500, Northern Pintail 4.
Meeslouwerplas: Great Crested Grebe 6, Horned Grebe 1, Water Rail 1, Long-tailed Tit 2.
Leidschendammerhout: White Stork 2, Canada Goose 5, Common Buzzard 4.
Vlietland: Great Northern Loon 1.
February 18 - Great Cormorant 8, Great Bittern 1, Glossy Ibis 3, Greater White-fronted Goose 2000, Greylag Goose 150, Eurasian Wigeon 4400, Common Teal 193, Northern Pintail 7, Northern Shoveler 49, Common Goldeneye 3 male 3 female, Smew 1 male 1 female, Eurasian Oystercatcher 28, Common Snipe 1, Black-headed Gull "Snow-white" present again.
Meeslouwerplas: Great Crested Grebe 13, Horned Grebe 1, Tufted Duck 220, Common Goldeneye 1 male 1 female.
Leidschendammerhout: Little Egret 1, Great Egret 2, White Stork 2, Gadwall 14, Common Teal 15, Mallard 17, Northern Pintail 5, Common Chaffinch 25.
February 17 - Little Egret 1, White Stork 2, Glossy Ibis 3, Mute Swan 3, Tundra Bean Goose 1, Greater White-fronted Goose 2200, Lesser Canada Goose 2, Barnacle Goose 121, Common Shelduck 26, Northern Pintail 11 male 6 female, Common Buzzard 1, Water Rail 2, Eurasian Curlew 500.
Meeslouwerplas: Little Grebe 3, Horned Grebe 1, Great Cormorant 6, Great Bittern 1, Great Egret 37, Grey Heron 5, Eurasian Spoonbill 1, Hen Harrier 1 female type, Eurasian Sparrowhawk 1, Common Buzzard 5, Water Rail 1, Common Kingfisher 2, Water Pipit 42, Cetti's Warbler 1 (calling), Long-tailed Tit 4.
Rietpolder: Great Northern Loon 1, Little Grebe 8, Gadwall 355, Common Teal 40, Northern Goshawk 1, Common Buzzard 3, Eurasian Siskin 1.
Passing: Grey Heron 3 NE, Common Snipe 1, Eurasian Skylark 3, Water Pipit 4, Common Starling 2400 NE (roost migration).
February 16 - Little Grebe 1, Great Cormorant 13, Great Bittern 1, Great Egret 1, Glossy Ibis 3, Common Shelduck 8, Common Teal 78, Northern Pintail 3 male 3 female, Common Goldeneye 3 male 3 female, Smew 1 male 3 female, Eurasian Oystercatcher 26, Common Snipe 6, Black-tailed Godwit 1.
Meeslouwerplas: Little Grebe 8, Great Crested Grebe 16, Horned Grebe 1, Great Cormorant 6, Great Bittern 1, Common Shelduck 4, Water Rail 1, Common Kingfisher 1.
Rietpolder: Great Northern Loon 1, Little Grebe 4, Common Teal 10, Northern Goshawk 1, Common Kestrel 1, Eurasian Oystercatcher 60.
Leidschendammerhout: White Stork 2, Gadwall 31, Common Teal 16, Northern Pintail 4 male 1 female.
February 15 - Little Grebe 2, Glossy Ibis 3, Common Shelduck 3, Northern Pintail 3, Common Goldeneye 4 male 3 female, Smew 2 male 2 female, Eurasian Oystercatcher 29.
Meeslouwerplas: Great Northern Loon 1 (also shortly present in de Meeslouwerplas), Little Grebe 10, Great Crested Grebe 17, Horned Grebe 1, Great Cormorant 5, Greylag Goose 160, Canada Goose 7, Egyptian Goose 2, Common Goldeneye 1 male, Common Buzzard 1, Common Kestrel 1, Common Kingfisher 1.
Leidschendammerhout: Common Shelduck 7, Gadwall 13, Northern Pintail 7 male 1 female.
Vlietland: Eurasian Oystercatcher 105.
Passing: Greater White-fronted Goose 75.
February 14 -
Vlietland: Great Northern Loon 1, Little Grebe 2, Common Goldeneye 1, Common Buzzard 1, Common Chaffinch 6.
February 13 - Great Cormorant 5, Great Egret 2, Glossy Ibis 3, Eurasian Spoonbill 1, Mute Swan 1, Common Shelduck 12, Common Teal 23, Northern Pintail 7 male 3 female, Common Goldeneye 3 male 3 female, Smew 1 male 1 female, Hen Harrier 1 female type, Common Buzzard 2, Common Kestrel 1, Water Rail 1, Eurasian Oystercatcher 27, Eurasian Curlew 38, Lesser Black-backed Gull 8.
Meeslouwerplas: Little Grebe 7, Horned Grebe 1.
Rietpolder: Great Northern Loon 1, Common Kingfisher 2.
Vlietland:
Passing: White Stork 2 NE.
February 12 - White Stork 2, Glossy Ibis 3, Common Goldeneye 1, Smew 2, Eurasian Oystercatcher 42, Lesser Black-backed Gull 2.
Meeslouwerplas: Little Grebe 3, Horned Grebe 1, Water Rail 1.
Rietpolder: Great Northern Loon 1, Little Grebe 11.

Great Northern Loon, 12-2-2016

January 29 - Great Bittern 1, Glossy Ibis 3, Common Goldeneye 7, Eurasian Oystercatcher 24, Northern Lapwing 30, Eurasian Curlew 55, Black-headed Gull 15000, Common Gull 1500, Lesser Black-backed Gull 20, European Herring Gull 300, Caspian Gull 1 3cy, Yellow-legged Gull 1 adult, Great Black-backed Gull 10, Water Pipit 8.
Meeslouwerplas: Great Egret 35, Water Rail 1, Black-headed Gull 2000, White Wagtail 1.
January 28 - Great Cormorant 22, Great Bittern 1, Great Egret 3, White Stork 2, Glossy Ibis 3, Common Shelduck 2, Northern Pintail 5, Common Pochard 61, Common Goldeneye 2 male 3 female, Smew 2 male 2 female, Hen Harrier 1 female type, Northern Goshawk 1, Peregrine Falcon 1, Eurasian Oystercatcher 11, Northern Lapwing 300, Lesser Black-backed Gull 2.
Meeslouwerplas: Black-necked Grebe 1, Eurasian Wigeon 201, Common Kingfisher 1.
Passing: Common Raven 2.
January 26 - Great Bittern 1, Glossy Ibis 3, Smew 3.
Leidschendammerhout: Hermine 1 (complete winter plumage).
January 25 - Great Cormorant 23, Great Bittern 1, Great Egret 4, Glossy Ibis 3, Greylag Goose 300, Eurasian Wigeon 5300, Common Teal 15, Northern Pintail 6, Tufted Duck 234, Common Goldeneye 3 male 6 female, Smew 2 male 1 female, Northern Goshawk 1, Northern Lapwing 400, Eurasian Curlew 350, Spotted Redshank 1, Lesser Black-backed Gull 2, Great Black-backed Gull 1.
Leidschendammerhout: Great Egret 1, White Stork 2, Greylag Goose 100, Canada Goose 18, Common Teal 7, Northern Pintail 4, Common Buzzard 1, Common Kingfisher 1.
Passing: Greater White-fronted Goose 260, Rose-ringed Parakeet 1.
January 23 - Great Cormorant 14, Great Bittern 1, Great Egret 2, Glossy Ibis 3, Bewick's Swan 21 adult 16 juvenile, Greater White-fronted Goose 4200, Greylag Goose 400, Common Shelduck 3, Eurasian Wigeon 5700, Common Teal 151, Common Pochard 64 male 16 female, Tufted Duck 372, Common Goldeneye 3 male 5 female, Smew 2 male 2 female, Northern Goshawk 1, Common Buzzard 1, Water Rail 1, Northern Lapwing 450, Eurasian Curlew 900, Spotted Redshank 1, Caspian Gull 1, Great Black-backed Gull 2, Bearded Reedling 2.
Meeslouwerplas: Little Grebe 4, Great Egret 47, Egyptian Goose 6, Water Rail 2, Common Kingfisher 1, Water Pipit 47, Cetti's Warbler 1.
Passing: White Stork 1 N, Egyptian Goose 17, Eurasian Sparrowhawk 1 SW.
January 22 - Hen Harrier 1 2cy, Carrion Crow 3.
January 20 - Great Crested Grebe 10, Great Cormorant 1, Glossy Ibis 3, Bewick's Swan 40, Greater White-fronted Goose 2900, Greylag Goose 300, Canada Goose 60, Egyptian Goose 4, Gadwall 50, Common Teal 95, Northern Pintail 36, Northern Shoveler 120, Common Pochard 53 male 23 female, Common Goldeneye 7 female, Smew 1 male 2 female, Water Rail 1, Eurasian Coot 30, Ruff 1, Common Snipe 3, Eurasian Curlew 920, Spotted Redshank 1, Lesser Black-backed Gull 3, Caspian Gull 1, Common Kingfisher 1, Common Blackbird 9, Fieldfare 8, Song Thrush 1, Bearded Reedling 2, Common Reed Bunting 1. Starrevaart frozen for 60%.
Meeslouwerplas: Little Grebe 3, Great Cormorant 6, Great Egret 58, Egyptian Goose 4, Gadwall 123, Common Teal 40, Common Pochard 8 male 6 female, Tufted Duck 240, Water Rail 1, Common Kingfisher 1, Water Pipit 33.
Leidschendammerhout: White Stork 4.
Passing: Common Wood Pigeon 20, Redwing 2.
January 19 - Great Crested Grebe 5, Glossy Ibis 3, Bewick's Swan 32, Greater White-fronted Goose 300, Greylag Goose 100, Barnacle Goose 25, Dark-bellied Brent Goose 1, Common Shelduck 3, Eurasian Wigeon 6000, Gadwall 80, Common Teal 80, Mallard 60, Northern Pintail 15, Northern Shoveler 20, Common Goldeneye 5, Smew 4, Hen Harrier 1, Ruff 5, Icelandic Black-tailed Godwit 1, Eurasian Curlew 500.
Vlietland: Tufted Duck 70, Common Goldeneye 3, Common Snipe 1, Common Kingfisher 1.
January 18 - Great Crested Grebe 13, Great Egret 1, Glossy Ibis 3, Bewick's Swan 28, Common Shelduck 20, Common Teal 115, Northern Pintail 15 male 4 female, Common Goldeneye 2 male 3 female, Smew 2 male 2 female, Goosander 1 male, Eurasian Sparrowhawk 1, Common Buzzard 1, Water Rail 1 (on the track near the hide), Eurasian Curlew 450, Spotted Redshank 1, Lesser Black-backed Gull 3. Starrevaart frozen for 40%.
Leidschendammerhout: White Stork 2, Common Buzzard 1, Common Kestrel 1, Song Thrush 2, Redwing 3.
January 16 - Great Crested Grebe 10, Glossy Ibis 4, Greylag Goose 176, Common Shelduck 3, Eurasian Wigeon 5500, Gadwall 73, Common Teal 40, Mallard 87, Northern Shoveler 7, Common Pochard 132, Tufted Duck 221, Common Goldeneye 5, Smew 2 male 2 female, Water Rail 1, Common Moorhen 2, Common Snipe 1, Black-headed Gull 19000, Common Gull 2500, Lesser Black-backed Gull 1, European Herring Gull 100.
Vlietland: Little Grebe 1, Great Crested Grebe 4, Great Cormorant 6, Grey Heron 1, Gadwall 48, Mallard 86, Tufted Duck 23, Common Goldeneye 2 male, Eurasian Coot 261, Eurasian Oystercatcher 7.
January 15 - Glossy Ibis 4, Northern Pintail 12 male 5 female, Common Goldeneye 2 male 1 female, Smew 2 male 2 female.
Passing: Common Raven 2.
January 14 - Great Crested Grebe 13, Glossy Ibis 4, Eurasian Wigeon 2000, Common Goldeneye 2 male 6 female, Smew 2 male 2 female, Eurasian Oystercatcher 8, Northern Lapwing 270.
Leidschendammerhout: Great Egret 2, White Stork 2, Mallard 35, Eurasian Sparrowhawk 1.
January 10 - Great Cormorant 8, Glossy Ibis 4, Common Teal 13, Northern Pintail 12, Common Goldeneye 2 male 7 female, Smew 1 male 1 female, Common Buzzard 1, Eurasian Oystercatcher 9, Lesser Black-backed Gull 3, Great Black-backed Gull 1.
January 9 - Great Cormorant 3, Glossy Ibis 4, Bewick's Swan 30, Greater White-fronted Goose 220, Greylag Goose 620, Bar-headed Goose 1, Canada Goose 7, Common Teal 77, Common Pochard 91 male 41 female, Common Goldeneye 2 male 3 female, Smew 2 male 1 female, Eurasian Sparrowhawk 1, Common Buzzard 1, Water Rail 1, Eurasian Oystercatcher 5, Pied Avocet 1, Northern Lapwing 600, Jack Snipe 2, Common Snipe 3, Cetti's Warbler 1.
Meeslouwerplas: Little Grebe 5, Great Egret 12, Egyptian Goose 2, Common Goldeneye 1 male 5 female, Eurasian Sparrowhawk 1, Common Buzzard 1, Water Pipit 45.
Passing: Greater White-fronted Goose 80, Stock Dove 5, Common Wood Pigeon 6, Fieldfare 2.
January 8 - Great Cormorant 5, White Stork 2, Common Goldeneye 4, Smew 1, Common Buzzard 1, Common Kestrel 1, Great Spotted Woodpecker 1, Eurasian Jay 1.
Leidschendammerhout: Common Stonechat 4.
January 6 - Glossy Ibis 4, Pied Avocet 7.
January 4 - Little Grebe 1, Great Crested Grebe 15, Great Cormorant 7, Great Egret 1, Glossy Ibis 4, Greylag Goose 60, Egyptian Goose 2, Common Shelduck 4, Eurasian Wigeon 2600, Common Teal 15, Northern Pintail 5, Common Goldeneye 4 male 4 female, Smew 1 male, Common Buzzard 1, Water Rail 1, Eurasian Oystercatcher 7, Northern Lapwing 260, Dunlin 1, Lesser Black-backed Gull 4.
Passing: Tundra Bean Goose 4 S.
January 3 - Glossy Ibis 4, Common Kestrel 1, Eurasian Oystercatcher 3, Common Snipe 1.
Meeslouwerplas: Gadwall 30, Common Goldeneye 1 male, Common Buzzard 1.
Passing: Greater White-fronted Goose 320, Dunlin 4, Common Wood Pigeon 30.

Some sightings were obtained through waarneming.nl