| Titre : | A radiotelemetry study of site and mate fidelity in the Eagle Owl Bubo bubo |
| Auteurs : | Lutz Dalbeck, Auteur ; Wilhelm Bergerhausen, Auteur ; Oliver Krischer, Auteur |
| Type de document : | Article |
| Dans : | Vogelwelt (Die) (119(6) 1998) |
| Article en page(s) : | 337-344 |
| Résumé : | In the years 1988 and 1989 we carried out a telemetry study on a population of reintroduced Eagle Owls in the northern Eifel Hills, Northrine-Westfalia, Germany. From 29 July 1988 to 19 June 1989 we were able to catch with self-constructed traps a total of eleven owls, eight of which were subsequently tracked. During the mating season three female and three male showed considerable interactions (visiting neighbouring breeding territories) to an individually varying extend. The strongest interactions were observed in two young owls (one female, one male) who tried to participate in reproduction for the first time, and by adult birds occupying unfavourable nest sites with very low breeding success. The two owls on nest sites with high probability of breeding success (one female, one male) never visited neighbouring pairs but received visits by their neighbours. From these results and further observations of mating Eagle Owls it is evident that individuals are not monogamous for their whole lives. Probably polygamy is part of their normal mating system. Observations on one female in summer 1988 show that only a few areas within the home range are used: some areas are visited regularly, while others - even those close to the nest site - are not visited at all. This female chose daytime roosts near her young only every three days, but intermittently roosted up to 4.7 km away. Being in the hunting areas already at dusk probably increases the hunting success. |
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