La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Hobby Falco subbuteo breeding in power line pylons in southern Jutland, Denmark (2016)
Auteurs :	Jesper Tofft, Auteur
Type de document :	Article
Dans :	Dansk Ornitologisk Forenings Tidsskrift (110(4) 2016)
Article en page(s) :	207-213
Langues:	Anglais
Résumé :	Nesting of Hobby in powerline pylons has been known in Denmark in an area in southern Jutland since 2005. This nesting habitat has been increasingly used in Germany and other countries in Central Europa since the 1980's, and in recent years there have also been a few records from southern Sweden. All the falcon nests were in old Crow Corvus corone nests at a height of about 19 m in pylons of the same powerline (Figs 1 and 2). Annual numbers of 1-3 pairs in three separate sections of the powerline were studied during 2005-2015 and 16 out of a total of 20 breeding attempts were successful. Mean size of fledged broods was 1.75 young among all pairs, and 2.18 young among successful pairs. The young fledged between 2(nd) and 14(th) of August with 8(th) August as the mean date (last chick leaving the nest). Normally, the nesting site in the same territory was moved from year to year by up to 2100 m and on average 600 m (n = 12). This study and studies from southern neighbouring countries seem to suggest that falcons breeding on pylons have a higher ratio of successful breeding pairs than tree nesters. Apparently, this is because nests on pylons are better protected against predators than nests in trees.

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