SOVON (1988) New estimates of breeding bird numbers in the Netherlands. LIMOSA 61 (3): 151-162.

With the publication of the Atlas of the birds in the Netherlands (SOVON 1987), there was an opportunity to update and correct earlier estimates of the numbers of breeding birds in the Netherlands. So far, most estimates suffered from lack of detailed information and incomplete coverage of the country. The recent upsurge in standardized breeding bird surveys has improved our knowledge on distribution and abundance of birds. The present analysis, which can be regarded as an extension and justification of the Atlas of breeding birds in the Netherlands (Teixeira 1979), is based on numerous regional avifaunistic books, reports, and data of people who have an intimate knowledge of their research area. In each district (fig. I) contact persons estimated the number of breeding pairs, mainly making use of published and unpublished data on densities. The main source of information were large scale studies of selected species and studies of all species in small size plots (tab. I). The data (estimates for each square) collected for the bird atlas (SOVON 1987) were not specifically used in the analysis, because they were related to numbers of birds instead of numbers of breeding pairs. The appendix gives the estimates from both atlasses, with an indication of the methods used and the reliability of the apparent trends. Because of methodological differences it is only for 30% of the species possible to make a direct comparison of the estimates in both books. ##### Little Grebe Tachybaptus ruficollis Great Crested Grebe Podiceps cristatus Red-necked Grebe Podiceps grisegena Black-necked Grebe Podiceps nigricollis Black-necked Grebe Podiceps nigricollis Great Cormorant Phalacrocorax carbo Great Cormorant Phalacrocorax carbo Eurasian Bittern Botaurus stellaris Little Bittern Ixobrychus minutus Black-crowned Night Heron Nycticorax nycticorax Little Egret Egretta garzetta Western Great Egret Ardea alba = Egretta alba Grey Heron Ardea cinerea Purple Heron Ardea purpurea White Stork Ciconia ciconia Eurasian Spoonbill Platalea leucorodia Mute Swan Cygnus olor Greylag Goose Anser anser Canada Goose Branta canadensis Egyptian Goose Alopochen aegyptiaca Ruddy Shelduck Tadorna ferruginea Common Shelduck Tadorna tadorna Mandarin Duck Aix galericulata Eurasian Wigeon Anas penelope Gadwall Anas strepera Common Teal Anas crecca Mallard Anas platyrhynchos Northern Pintail Anas acuta Garganey Anas querquedula Northern Shoveler Anas clypeata = Spatula clypeata Red-crested Pochard Netta rufina Common Pochard Aythya ferina Ferruginous Duck Aythya nyroca Tufted Duck Aythya fuligula Common Eider Somateria mollissima Common Goldeneye Bucephala clangula Red-breasted Merganser Mergus serrator European Honey Buzzard Pernis apivorus Black Kite Milvus migrans Red Kite Milvus milvus Western Marsh Harrier Circus aeruginosus Hen Harrier Circus cyaneus Montagu's Harrier Circus pygargus Northern Goshawk Accipiter gentilis Eurasian Sparrowhawk Accipiter nisus Common Buzzard Buteo buteo Common Kestrel Falco tinnunculus Eurasian Hobby Falco subbuteo Peregrine Falcon Falco peregrinus Black Grouse Lyrurus tetrix Red-legged Partridge Alectoris rufa Grey Partridge Perdix perdix Common Quail Coturnix coturnix Common Pheasant Phasianus colchicus Water Rail Rallus aquaticus Spotted Crake Porzana porzana Little Crake Porzana parva Corn Crake Crex crex Common Moorhen Gallinula chloropus Eurasian Coot Fulica atra Eurasian Oystercatcher Haematopus ostralegus Black-winged Stilt Himantopus himantopus Pied Avocet Recurvirostra avosetta Little Ringed Plover Charadrius dubius Common Ringed Plover Charadrius hiaticula Kentish Plover Charadrius alexandrinus Eurasian Dotterel Charadrius morinellus = Eudromias morinellus European Golden Plover Pluvialis apricaria Northern Lapwing Vanellus vanellus Dunlin Calidris alpina = Calidris alpina schinzii Ruff Philomachus pugnax Common Snipe Gallinago gallinago Eurasian Woodcock Scolopax rusticola Black-tailed Godwit Limosa limosa Eurasian Curlew Numenius arquata Common Redshank Tringa totanus Common Sandpiper Actitis hypoleucos = Tringa hypoleucos Mediterranean Gull Ichthyaetus melanocephalus = Larus melanocephalus Little Gull Hydrocoloeus minutus = Larus minutus Common Gull Larus canus canus Lesser Black-backed Gull Larus fuscus European Herring Gull Larus argentatus Sandwich Tern Thalasseus sandvicensis = Sterna sandvicensis Common Tern Sterna hirundo Arctic Tern Sterna paradisaea = Sterna macrura Little Tern Sternula albifrons = Sterna albifrons Black Tern Chlidonias niger White-winged Tern Chlidonias leucopterus Stock Dove Columba oenas Common Wood Pigeon Columba palumbus Eurasian Collared Dove Streptopelia decaocto European Turtle Dove Streptopelia turtur Common Cuckoo Cuculus canorus Barn Owl Tyto alba Little Owl Athene noctua Tawny Owl Strix aluco Long-eared Owl Asio otus Short-eared Owl Asio flammeus Tengmalm's Owl Aegolius funereus European Nightjar Caprimulgus europaeus Common Swift Apus apus Common Kingfisher Alcedo atthis European Bee-eater Merops apiaster Eurasian Hoopoe Upupa epops Eurasian Wryneck Jynx torquilla European Green Woodpecker Picus viridis Black Woodpecker Dryocopus martius Great Spotted Woodpecker Dendrocopos major Middle Spotted Woodpecker Dendrocopos medius Lesser Spotted Woodpecker Dendrocopos minor Crested Lark Galerida cristata Wood Lark Lullula arborea Eurasian Skylark Alauda arvensis Sand Martin Riparia riparia Barn Swallow Hirundo rustica Common House Martin Delichon urbicum = Delichon urbica Tawny Pipit Anthus campestris Tree Pipit Anthus trivialis Meadow Pipit Anthus pratensis Blue-headed Wagtail Motacilla flava Yellow Wagtail Motacilla flavissima = Motacilla flava flavissima Grey Wagtail Motacilla cinerea White Wagtail Motacilla alba Pied Wagtail Motacilla yarrellii = Motacilla alba yarrellii Winter Wren Troglodytes troglodytes Dunnock Prunella modularis European Robin Erithacus rubecula Common Nightingale Luscinia megarhynchos Bluethroat Luscinia svecica = Cyalnosylvia svecica Black Redstart Phoenicurus ochruros Common Redstart Phoenicurus phoenicurus Whinchat Saxicola rubetra British Stonechat Saxicola rubicola = Saxicola torquata Northern Wheatear Oenanthe oenanthe Common Blackbird Turdus merula Fieldfare Turdus pilaris Song Thrush Turdus philomelos Mistle Thrush Turdus viscivorus Cetti's Warbler Cettia cetti Zitting Cisticola Cisticola juncidis Common Grasshopper Warbler Locustella naevia Savi's Warbler Locustella luscinioides Marsh Warbler Acrocephalus palustris Sedge Warbler Acrocephalus schoenobaenus European Reed Warbler Acrocephalus scirpaceus Great Reed Warbler Acrocephalus arundinaceus Icterine Warbler Hippolais icterina Lesser Whitethroat Sylvia curruca Common Whitethroat Sylvia communis Garden Warbler Sylvia borin Blackcap Sylvia atricapilla Western Bonelli's Warbler Phylloscopus bonelli Wood Warbler Phylloscopus sibilatrix Common Chiffchaff Phylloscopus collybita Willow Warbler Phylloscopus trochilus Goldcrest Regulus regulus Firecrest Regulus ignicapilla Spotted Flycatcher Muscicapa striata Red-breasted Flycatcher Ficedula parva European Pied Flycatcher Ficedula hypoleuca Bearded Reedling Panurus biarmicus Long-tailed Tit Aegithalos caudatus Marsh Tit Poecile palustris Willow Tit Poecile montanus Crested Tit Lophophanes cristatus Coal Tit Periparus ater Blue Tit Cyanistes caeruleus Great Tit Parus major Eurasian Nuthatch Sitta europaea Eurasian Treecreeper Certhia familiaris familiaris Short-toed Treecreeper Certhia brachydactyla Eurasian Penduline Tit Remiz pendulinus Eurasian Golden Oriole Oriolus oriolus Red-backed Shrike Lanius collurio Great Grey Shrike Lanius excubitor Eurasian Jay Garrulus glandarius Eurasian Magpie Pica pica Western Jackdaw Coloeus monedula Rook Corvus frugilegus Carrion Crow Corvus corone Hooded Crow Corvus cornix = Corvus corne cornix Common Raven Corvus corax Common Starling Sturnus vulgaris House Sparrow Passer domesticus Eurasian Tree Sparrow Passer montanus Common Chaffinch Fringilla coelebs Brambling Fringilla montifringilla European Serin Serinus serinus European Greenfinch Carduelis chloris European Goldfinch Carduelis carduelis Common Linnet Carduelis cannabina Unidentified Redpoll Carduelis cabaret/flammea Common Crossbill Loxia curvirostra Eurasian Bullfinch Pyrrhula pyrrhula Hawfinch Coccothraustes coccothraustes Yellowhammer Emberiza citrinella Ortolan Bunting Emberiza hortulana Common Reed Bunting Emberiza schoeniclus Corn Bunting Emberiza calandra Corn Bunting Emberiza calandra Black-headed Gull Chroicocephalus ridibundus = Larus ridibundus

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