La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Northwest European Bewick's Swans: a population in decline
Auteurs :	Eileen C. Rees, Auteur ; Jan H. Beekman, Auteur
Type de document :	Article
Dans :	British Birds (103(11) NOV 2010)
Article en page(s) :	640-650
Résumé :	Whereas most European swan and goose population trends are currently stable or increasing, the northwest European Bewick's Swan Cygnus columbianus bewickii population is of conservation concern because its numbers are in decline. Bewick's Swan numbers rose during the 1960s-1990s, but a coordinated international census in January 2005 recorded a total of c. 21,500 birds, a 27% decrease on the peak count of 29,277 in January 1995. National trends indicate that numbers have continued to decline since then. A Bewick's Swan action planning workshop in St Petersburg in September 2009 attempted to identify major threats to the birds and to develop the monitoring, research and conservation work required to halt and reverse the population decline. It was evident that no single issue could explain the decline in numbers since the mid 1990s, and that the combination of factors (including weather and habitat changes) affecting the swans' survival and productivity should be examined further. A Single Species Action Plan, which is now in draft, is due to be finalised and sent for government consultation by the end of 2010, in preparation for adoption at the African-Eurasian Waterbird Agreement (AEWA) Technical Committee in March 2011 and implementation thereafter.

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