Sex- and age-related differences in the biometrics of a wintering population of Yellowhammers (Emberiza citrinella)

• Autores: Raül Aymí
• Localización: Butlletí del Grup Català d'Anellament, ISSN 1130-2070, Vol. 10, Nº. 1, 1993, págs. 1-7
• Idioma: inglés
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• Resumen

  • The biometrics of a population oF Yellowhammers wintering in NE Spain are detailed, Males had significantly longer mean wing-length and tail-length than Females, and they were also significantly heavier. First winter birds had smaller mean wing-length and bill-depth than adults. Discriminant analysis using wing-Iength and body mass permitted the correct sexing of 90% of the individuals, whereas ageing analysis only gave correct discrimination For 65%. Biometrics are a useful additional sexing criterion, but they should not be used alone to age birds