La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Drain ditches as habitat for hibernating Green Sandpipers Tringa ochropus, Snipes Gallinago gallinago, and Water Rails Rallus aquaticus in the region of Lake Ammersee
Auteurs :	Ursula Wink, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (49(1) JUL 2010)
Article en page(s) :	53-66
Résumé :	The plain south of Lake Ammersee was primarily uncultivated marshy country. Since the years after 1920 it was dried out with drain channels. Though these changed the character of the area, they have developped to a refugium for some hibernating birds, when in winter the borders of the lake and along the rivers get frozen. Then the Green Sandpiper, the Snipe and the Water Rail have to search new areas for nutrition.In the ditches they can find Gammarides, insects, and little fishes. In almost every winter from 2001 to 2009 the Green Sandpiper hibernated in the region of Lake Ammersee, some the whole winter. Totally 53 individuals were registrated in 8 years, most of them (46) in the drain ditches. The dependence on the weather was significant. They were missed in the extreme-winters 2005/06 with 93 frosty days and a lot of snow and in the extraordinary soft winter 2006/07.Snipes stayed with

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