La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Period of reproduction and data about hatching and fledging success of Common Sandpipers on rivers Ammer and Upper Isar, Upper Bavaria.
Auteurs :	Michael Schoedl, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (42(1) Januar 2003)
Article en page(s) :	51-56
Résumé :	Between 1996 and 2002 Common Sandpipers (Actitis hypoleucos) were observed at the Upper Isar river and the Upper and Middle Ammer river (Upper Bavaria). During this time data were collected that show the reproduction period of these birds. It lasts from April 1st to August 18th. It is necessary to protect this endangered species at least between April 1st and July 30th. Although hatching success (Ammer 76%; Isar 80%) and fledging success (Ammer 55%; Isar 67%) in regard to the number of breeding sites was similar at both rivers, there is a marked difference in the number of fledglings. At the Upper Isar rarely three and never four fledging chicks were observed at the breeding site. The main reason is greater human activity and disturbance at the Isar. Protection should begin there immediately.

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