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Titre :	Results of the January 2013 waterbird census in Slovenia
Auteurs :	Luka Bozic, Auteur
Type de document :	Article
Dans :	Acrocephalus (34(156) 2013)
Article en page(s) :	93-103
Résumé :	In 2013, the Waterbird Census (IWC) was carried Out on 19 and 20 Jan. Waterbirds were counted on all larger rivers, on the entire Slovenian Coast land and on most of the major standing waters in the country. During the census, in which 273 observers took part, 401 sections of the rivers and coastal sea with a total length of 1,365.3 km and 174 other localities (129 standing waters and 45 streams) were surveyed. Altogether, 48,963 waterbirds belonging to 68 species were counted. This is the lowest number of waterbirds recorded after the 2004 census but, together with the years 2008 and 2010, also the highest number of species ever recorded in Slovenia during the IWC. The greatest numbers of waterbirds were counted in the Drava count area, i.e. 17,606 individuals (36.0% of all waterbirds in Slovenia). By far the most numerous species was Mallard Anas platyrhynchos (46.0% of all waterbirds), followed by Yellow-legged Gull Larus michahellis (7.3% of all waterbirds), Black-headed Gull Chroicocephalus ridibundus (7.1% of all waterbirds), Coot Fulica atra (5.6% of all waterbirds) and Cormorant Phalacrocorax carbo (4.3% of all waterbirds). The number 1,000 of the counted individuals was also surpassed by Mute Swan Cygnus olor, White-fronted Goose Anser albifrons, Common Gull Larus canus and Grey Heron Ardea cinerea. Among the rarer recorded species, the Tundra Swan Cygnus columbianus bewickii (registered for the first time during the January Waterbird Censuses and only for the third time ever in Slovenia) should be given a special mention. Numbers of the following species were the highest so far recorded during the IWC: White-fronted Goose, Pintail Anas acuta, Goosander Mergus merganser and Crane Grus grus. Numbers of the following species were the lowest so far recorded during the IWC: Tufted Duck Aythya Goldeneye Bucephala clangula, Cormorant, Little Egret Egretta garzetta, Little Grebe Tachybaptus ruficollis, Coot and Green Sandpiper Tringa ochropus.

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