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Bill color, not badge size, indicates testosterone-related information in house sparrows
Silke Laucht, Bart Kempenaers and James DaleVolume:
64
Language:
english
Journal:
Behavioral Ecology and Sociobiology
DOI:
10.2307/40863212
Date:
September, 2010
File:
PDF, 1.63 MB
english, 2010