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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Space-time behaviour and the age of eastern German Common Swifts Apus apus after recoveries. (2015)
Auteurs :	Winfried Otto, Auteur
Type de document :	Article
Dans :	Vogelwarte (53(1) 2015)
Article en page(s) :	21–33
Langues:	Allemand
Résumé :	Since 1964, 29,053 Common Swifts have been marked with rings of Vogelwarte Hiddenseee. They revealed 2,154 recoveries of 1,464 individuals. This corresponds to a recovery rate of 4.6 % (excluding short-term local recaptures). However, the recovery rate (based on individuals and without short-term local recaptures) of the 10,738 individuals ringed as a nestlings is only 1.2 % (n = 129) and the majority (n = 97) consist of recoveries at the place of hatching. Of the eastern German Common Swifts 18 recoveries over distances of more than 100 km are retraps and dead recoveries to about even parts. Outside Germany, eleven Swifts were recovered, two of them in their winter quarters in the south of the Central African Republic. The recovery file contains a total of 152 recaptures between 10 and 100 km of 138 individuals. Mutual ring controls of two ringers using nets provided 101 recaptures of 93 individuals. In an extreme case, two Swifts were recaptured after six years, which were ringed the same day and were checked elsewhere again together and at the same day. The 1,787 long-term local recaptures include 1,138 individuals, of which the majority has been ringed at the breeding locations and was partly retrapped there several times in subsequent years. 118 individuals of all age classes have been reported as dead recoveries. Of 114 nestlings – which equals 10 % of all retrapped individuals - exists a total of 163 recoveries. The recovery rate of 0.9 % indicates very low birth site fidelity. Two thirds of the ringed nestlings were two or three years old at the first recovery – mostly at breeding places. However, already one year old birds can breed, and the Swift is definitely sexually mature in the second calendar year. Six recoveries give an indication of a settlement > 10 km from the place of hatching. Supplemented by literature data (n = 69) mean dispersal distance for those bird that where not found at the place of hatching is 34 km. There is no evidence of changes in breeding places of adult Swifts in the data from eastern Germany. The proportion of non-breeders could not be quantified.

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