La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Recovery of the White-tailed Eagle Haliaeetus albicilla, Black Stork Ciconia nigra and Common Crane Grus grus populations in Silesia (SW Poland)
Auteurs :	Grzegorz Kopij, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (135(3) 2015)
Article en page(s) :	121-130
Résumé :	Distribution and numbers of breeding pairs of the White-tailed Eagle, Black Stork and Common Crane during the years 2004-2007 have been determined by means of a questionnaire directed to particular forest districts (n = 871) through forest inspectorates in Silesia (SW Poland, c. 42,000 km(2)). During the years 2004-2007, c. 100 occupied territories of the White-tailed Eagle were recorded in Silesia. They are concentrated in two areas, Barycz Valley and Bory Dolnoslaskie, with 20-30 occupied territories each. The Black Stork occurs all over Silesia, being more common in Stobrawa Forests and Sudety Mts. During the years 2004-2007, 124 occupied territories were recorded. The Common Crane is widespread all over Silesian lowlands with 353 pairs recorded during the years 2004-2007. Over the last 100 years, all these species have substantially increased their numbers in Silesia. At the beginning of 20th century only 57-67 pairs of the Common Crane, 10 pairs of the Black Stork and none of the White-tailed Eagle nested in Silesia.

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