La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Changes in the populations of small birds in central Europe, as evidenced by 32 years of trapping data: Numbers are mostly declining
Auteurs :	Peter Berthold, Auteur ; Wolfgang Fiedler, Auteur
Type de document :	Article
Dans :	Vogelwarte (43(2) MAY 2005)
Article en page(s) :	97-102
Langues:	Allemand
Résumé :	At the Mettnau Station in southern Germany trapping of birds of 33 species during 1972-2003 yielded 181,186 first traps, the present evaluation of which has produced 4 main results: (1) the total numbers trapped decreased significantly during the study period (Fig. 1), (2) the most severe decline was found for long-distance migrants (Table 1, Fig. 2),(3) the average annual decrease in numbers trapped overall was 0.7% per year, but for long-distance migrants 1.1%, (4) the average number of individuals of all species trapped per year fell from 6474 in the first half of the study period to 5604 in the second half.

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