La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Natural nest sites of the pied flycatcher Ficedula hypoleuca in a Primeval Forest
Auteurs :	D. Czeszczewik, Auteur ; W. Walankiewicz, Auteur
Type de document :	Article
Dans :	Ardea (91(2) FAL 2003)
Article en page(s) :	221-229
Résumé :	Pied Flycatchers Ficedula hypoleuca have been studied intensively in nest boxes, but data on their reproduction in natural nest holes is scarce. We present data on the location of 180, and on the dimensions of 104 Pied Flycatcher holes and some breeding data collected in the Bialowieza National Park. In the oak-lime-hornbeam stands flycatchers preferred hornbeam Carpinus, in the riverine alders Alnus and ashes Fraxinus for breeding. The holes were on average 8.2 m above the ground, in trees of mean diameter at breast height of 46 cm. Holes were situated mostly in tree trunks (84%), in living trees (76%). The share of woodpecker-made holes was 34%. Their minimum entrance diameter was 3.5 cm on average. Openings were usually circular or slightly oval (69%). The distance between the hole entrance and bottom (danger distance) was

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