La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Evidence of facultative daytime hypothermia in a small passerine wintering at northern latitudes
Auteurs :	Agnes Lewden, Auteur ; Magali Petit, Auteur ; Myriam Milbergue, Auteur ; Stephane Orio, Auteur ; François Vézina, Auteur
Type de document :	Article
Dans :	Ibis (156(2) APR 2014)
Article en page(s) :	321-329
Résumé :	The use of hypothermia as a means to save energy is well documented in birds. This energy-saving strategy is widely considered to occur exclusively at night in diurnally active species. However, recent studies suggest that facultative hypothermia may also occur during the day. Here, we document the use of daytime hypothermia in foraging Black-capped Chickadees Poecile atricapillus wintering in eastern Canada. We measured the body temperature (T-b) of 126 individuals (plus

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