Aves, p�le ornithologique de Natagora

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Aves, 41/1-2 | 2004 | 1-61

  Results of the winter censuses of waterbirds in Wallonie and Brussels area (Belgium) between 1998-1999 and 2003-2004.
Jacob, J.-P., Loly, P., & Kinet, TH.

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Article summary

Winter censuses of waterbirds from 1998-99 to 2003-2004 in Wallonia and in the Brussels area were conducted during rather mild winters, with limited cold spells occurring notably early in 2003 (when arrivals of Wigeons, Mallards, Goosanders, Cormorants and Tufted duck were noted). The results per winter and per region are shown in table 7a-f (see Fig.2 for the regions); they are summarized in table 8. Totals for January censuses are 22.317 to 28.603 indigenous anatidae and an increasing number of birds of introduced species (1.768 in January 2004, amounting to 6,4 % of the totals for this family). Laridae numbered about 60.000 ex. and the other species from 10 to 13.000 individuals, mainly Cormorants, Moorhens and Coots. Observed numbers generally remain within recent variations except for record numbers of Whooper swans and Teals in 2002, of Moorhens in 2000 and of species that clearly increase such as Cormorant, Great White Egret, Canada Goose, Mute Swan and Gadwall. Results of gulls censused at resting places in 2000 (table 11) confirm the decrease of the Herring Gull, small numbers of wintering Lesser black-backed Gulls as well as the occurrence of a few Yellow-legged and Pontic Gulls. (PLe)

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