La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Using complementary approaches to estimate survival of juvenile and adult Eastern Kingbirds
Auteurs :	Lucas J. Redmond, Auteur ; Michael T. Murphy, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (83(3) SEP 2012)
Article en page(s) :	247-259
Langues:	Anglais
Résumé :	Survival rates of young birds during the period between nest departure and their first breeding season is an important but difficult statistic to measure because of low natal site fidelity, especially for long-distance migrants. From 2002 to 2008, we conducted a capture-mark-resight study of Eastern Kingbirds (Tyrannus tyrannus), a Nearctic-Neotropical migrant, at Malheur National Wildlife Refuge, Oregon, to estimate juvenile (SJ) and adult (SA) survival. The return rate of juvenile kingbirds was high (0.224) and not significantly different from program MARK's estimate of SJ (0.291). On average, and for both sexes, program MARK's estimate of SA for birds banded as nestlings (0.64) was similar to that for birds first banded as adults (0.65). Enumeration methods and MARK yielded similar estimates of SA, especially for males banded as adults. We attribute the similarity of resighting rate of birds banded as nestlings to SJ and the similarity of

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