La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	[Population development in the Swift Apus apus in Anroechte, Central Westphalia, Germany.]
Auteurs :	Karl-Heinz Loske, Auteur ; Willi Eickhoff, Auteur ; Heinz Ulitzka, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (122(6) 2001)
Article en page(s) :	351-355
Résumé :	The Swift population in Anrochte/Central Westphalia, Germany, was surveyed annually from 1980 to 2000. The breeding site, a large public building, was reconstructed and most of the original breeding cavities were closed. To compensate for this loss, 60 artificial neststones were attached to the building in 1987. The population under control since 1989 increased to 34 nesting pairs in 1993, but declined drastically in 1994 and reached its lowest level with 12 pairs in 1996. However, 1997, 1998 and 2000 wear peak years again. Breeding success was at 88,2%, disregarding eggs or nestlings thrown out of the nest by adults. The number of fledged juveniles per pair on average was 1.5. Within the colony, 393 nestlings and 122 adults were ringed. There was one record of birth-site fidelity in 2000 of a nestling ringed in 1998. The oldest Swift recorded was 11 years. Knowledge of population development in the Swift in Germany is very limited. Because there are no other long-term monitoring programs for this species, we intend to continue monitoring the population in Anroechte.

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