(* = Kurzbeitrag)
Ansiedlungsverhalten des Mauerseglers Apus apus in der Kirche Oberkirch in der Nordwestschweiz.
(von 1994 bis 2006 vergeben)
Bestand, Bestandsentwicklung, Population, Verbreitung, Nistkästen, Brutplatz, Nestplatz, Altersphänologie, Lebensdauer, Bruterfolg, Fang, Beringung, Wiederfänge, Überlebensrate, Rückkehrer, Erstbrüter
Zullwil, Thierstein, Solothurn, Laufen, Basel-Landschaft, Jura, Schweiz
Settlement patterns of Common Swifts Apus apus in the church Oberkirch in northwestern Switzerland. With 59 breeding pairs, the colony of Common Swifts Apus apus in the church Oberkirch in Zullwil (canton of Solothurn) is the largest colony in the Laufental-Thierstein region. Since 2004, regular controls of the adult birds have been carried out in addition to the ringing of the nestlings. In contrast to other studies, we captured many of the adult birds several times in their lifes. In total, 27 % of the captured adults hatched at the church Oberkirch, 5 % were ringed in other colonies, and the origin of the remaining adult birds is unknown. In comparison to studies from other regions, the proportion of philopatric adult birds is high. On average, 82 % of the breeding adults returned in the following year. This means for first-time breeders that chances for a nesting place arise only when a previous year’s breeding bird or breeding pair does not return. Half of the first recaptures of birds ringed as nestlings in the church Oberkirch were three years old, 31 % were two years old, 1 bird was one year old, and 15 % were four years old or older. 70 % of the birds successfully raised young on their first breeding attempt. In the case of two-year-old birds, however, this was only just under half; in the case of three-year-old birds, it was 80 %. Probably not only the experience or age of a fist-time breeder played a role for breeding success, but also the experience and age of its partner.
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