La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Movements and mortality of Ferruginous Hawks banded in Montana
Auteurs :	A. R. Harmata, Auteur ; M. Restani, Auteur ; G. J. Montopoli, Auteur ; J. R. Zelenak, Auteur ; J. T. Ensign, Auteur ; P. J. Harmata, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (72(3) SUM 2001)
Article en page(s) :	389-398
Langues:	Anglais
Résumé :	Of 233 Ferruginous Hawks (Buteo regalis) banded as nestlings in three study areas of Montana over 16 years, 15 (6.4%) were recovered. Recovery rate increased with duration of study and cumulative number banded. Mean age at recovery, for all Ferruginous Hawks banded in Montana was 390 days. Analysis indicated 50% of banded hawks were dead by between 0.35 and 0.70 yr and 95% were dead by between 1.5 and 3 yr of age. Survival estimated at one year was higher if hawks recovered by radio-tracking were excluded. Mean distance from the natal nest of all recoveries of Ferruginous Hawks banded in Montana was 824 km, Eight recoveries were of recently fledged hawks

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