La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Crossing the Tyrrhenian Sea: Spring migration of Marsh Harriers (Circus aeruginosus), sex classes and relation to wind conditions.
Auteurs :	Michele Panuccio, Auteur ; Nicolantonio Agostini, Auteur ; Bruno Massa, Auteur
Type de document :	Article
Dans :	Vogelwarte (41(4) Dezember 2002)
Article en page(s) :	271-275
Langues:	Allemand
Résumé :	Marsh Harriers were observed during their spring migration across the Tyrrhenian Sea on the Island of Ustica (ca. 60 km north of western Sicily) between March 22 and April 16, 2002. During the period, a total of 648 birds were registered, arriving from south and southwest and continuing the sea crossing towards northeast. Only a small portion of birds was observed during morning hours; most of them appeared in the afternoon, 2 to 3 hours before sunset. This is proof that Marsh Harriers cross the sea also at night. At low winds (

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