La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Male Blue Tits Cyanistes caeruleus choose early-leafing tree species during spring dawn chorus (2006)
Auteurs :	Timothy H. Parker, Auteur ; Heidi Tillin, Auteur
Type de document :	Article
Dans :	Bird Study (53 JUL 2006)
Article en page(s) :	253-257
Résumé :	Capsule Blue Tits song their dawn song in trees that provided greater concealment. Aims To determine if dawn singing Blue Tits select trees that increase their concealment. Methods We compared the timing of leaf growth initiation in Blue Tit song-post trees to the average timing of leaf growth initiation for other tree species within 25 m of the song-post. Results Most Blue Tits (96%, n = 23) sang from tree species that begin leaf growth earlier than the average tree available within 25 m. If males singing in Hawthorns Crataegus monogyna were excluded, 92% (n = 13) sang from earlier leafing trees. Conclusion Dawn singing Blue Tits select perches that offer greater concealment.

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