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Reproductive correlates of spring arrival date in the Eastern Kingbird Tyrannus tyrannus

Nathan W. Cooper, Auteur ; Michael T. Murphy, Auteur ; Lucas J. Redmond, Auteur ; Amy C. Dolan, Auteur

Dans Journal of Ornithology (152(1) JAN 2011)

Harsh weather in spring presents energetic challenges to birds during migration and upon reaching the breeding grounds, and yet, birds often arrive well before breeding begins. We studied a population of Eastern Kingbirds in eastern Oregon from [...]

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