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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Occurrence of Red-necked Phalaropes Phalaropus lobatus in Germany and at the African Atlantic coast
Auteurs :	Guenther Busche, Auteur ; Peter Becker, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (131(3) 2010)
Article en page(s) :	185-194
Résumé :	Records of the Red-necked Phalarope on passage along the coasts of Germany are mostly from Schleswig-Holstein. Annual numbers recorded there were stable in the period 1965-2005 (average 58/year), although they have fluctuated greatly between 14 and 257 individuals per year. Spring passage in Schleswig-Holstein occurs between the 27(th) April and 19(th) June (median date 26(th) May); autumn passage between 30(th) June and 27(th) October (median date 23(rd) August). The median dates are more or less the same as in the other federal states in northern Germany (Mecklenburg-Western Pomerania and Lower Saxony). Autumn passage of first-year birds occurred in Schleswig-Holstein between 20(th) July and 19(th) October. The median dates of first-year and adult birds are 6(th) and 29(th) August, respectively. Most birds (85% of the total) are recorded in autumn, and the majority is recorded in coastal areas, with most (84%) of the observations coming from the North Sea coast. Data on the temporal distribution of records of different sexes and age groups, summer records, flock size (56% of all records were of single individuals), duration of stay (up to 45 days) and extreme early or late records are presented. Within Germany, the occurrence of Red-necked Phalaropes on passage decreases to the south and to a greater extent to the southeast.As the origin of Red-necked Phalaropes touching Germany during migration is unknown, it is speculated whether those birds may come from southern Scandinavia. It appears unlikely that they originate from Iceland, and data from the East Atlantic off Africa are presented to feed a hypothesis that NW European breeders may follow a migration route to the south rather than to the southeast.

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