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Aves, 47/4 | 2010 | 213-228

  Results of the winter censuses of waterbirds in Wallonie and Brussels area (Belgium) in 2009-2010.
Derouaux, A., Loly, P., Paquet, J.-Y., Leunen, S. & Jacob, J.-P.

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Article summary

The 2009-2010 winter was cold and snowy. It was notable for the number of ducks, geese and swans, which was above the ten-year average, and for below-average numbers of the other species. There were large numbers of Common Goldeneye Bucephala clangula, Gadwall Anas strepera, Mallard Anas platyrhynchos, and Common Pochard Aythya ferina. There were record numbers of Canada Goose Branta canadensis; the increase of this species continues. Numbers of roosting gulls were generally quite large, and greater than in the winter of 2008-2009. Roost counts suggest that the numbers of the Great Cormorant Phalacrocorax carbo have now stabilised at a lower level than at the time of their peak abundance in 2002-2003. This is especially true along the river Meuse, which seems no longer to be the optimal habitat that it was at that time.

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Aigrette garzette (Egretta garzetta), Bécassine des marais (Gallinago gallinago), Bécassine sourde (Lymnocryptes minimus), Bernache de Magellan (Chloephaga picta), Bernache du Canada (Branta canadensis), Bernache nonnette (Branta leucopsis), Butor étoilé (Botaurus stellaris), Canard à collier noir (Calonetta leucophrys), Canard à crinière (Chenonetta jubata), Canard chipeau (Anas strepera), Canard colvert (Anas platyrhynchos), Canard des Bahamas (Anas bahamensis), Canard mandarin (Aix galericulata), Canard pilet (Anas acuta), Canard siffleur (Anas penelope), Canard souchet (Anas clypeata), Chevalier cul-blanc (Tringa ochropus), Chevalier guignette (Actitis hypoleucos), Courlis cendré (Numenius arquata), Cygne chanteur (Cygnus cygnus), Cygne de Bewick (Cygnus columbianus bewickii), Cygne noir (Cygnus atratus), Cygne tuberculé (Cygnus olor), Érismature rousse (Oxyura jamaicensis), Foulque macroule (Fulica atra), Fuligule milouin (Aythya ferina), Fuligule milouinan (Aythya marila), Fuligule morillon (Aythya fuligula), Goéland argenté (Larus argentatus), Goéland cendré (Larus canus), Goéland leucophée (Larus michahellis), Goéland pontique (Larus cachinnans), Grand Cormoran (Phalacrocorax carbo), Grande Aigrette (Casmerodius albus), Grèbe à cou noir (Podiceps nigricollis), Grèbe castagneux (Tachybaptus ruficollis), Grèbe esclavon (Podiceps auritus), Grèbe huppé (Podiceps cristatus), Grèbe jougris (Podiceps grisegena), Harle bièvre (Mergus merganser), Harle couronné (Lophodytes cucullatus), Harle piette (Mergellus albellus), Héron cendré (Ardea cinerea), Macreuse brune (Melanitta fusca), Macreuse noire (Melanitta nigra), Nette demi-deuil (Netta peposaca), Nette rousse (Netta rufina), Oie à tête barrée (Anser indicus), Oie cendrée (Anser anser), Oie de la toundra (Anser fabalis rossicus), Oie des moissons (Anser fabalis), Oie rieuse (Anser albifrons), Plongeon catmarin (Gavia stellata), Plongeon imbrin (Gavia immer), Sarcelle d'hiver (Anas crecca), Sarcelle tachetée (Anas flavirostris), Tadorne casarca (Tadorna ferruginea), Tadorne de Belon (Tadorna tadorna), Vanneau huppé (Vanellus vanellus)