La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Density, nest site and breeding success of a rural population of the Magpie (Pica pica) in NE Slovenia
Auteurs :	Milan Vogrin, Auteur
Type de document :	Article
Dans :	Vogelwarte (39(4) Dec., 1998)
Article en page(s) :	293-297
Langues:	Allemand
Résumé :	Breeding ecology of a rural Magpie Pica pica population was studied in northeastern Slovenia during 1989-1991 and 1997. The estimated breeding density was 0.5 breeding pairs/10 ha on 346 ha of research area. Magpie nests were found in at least 14 species of trees or bushes. 24% of nests (N = 75) were found on coniferous trees. The height of the nest varied significantly according to the tree species. Nests were built significantly lower on bushes with thorns than in coniferous and deciduous trees. However, differences between coniferous and deciduous trees do not exist. Breeding success was low 37% failed to fledge any young. The most important cause of nesting failures is predation with 32% of losses. The average clutch size was 6.0, SD = 0.93 (N = 28) and the average egg size was 33.6 +- 2.75 X 23.2 +- 0.69 mm (N = 80).

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