Sex and age determination in nestling Goshawks (Accipiter gentilis

• Autores: Santi Mañosa
• Localización: Butlletí del Grup Català d'Anellament, ISSN 1130-2070, Vol. 11, Nº. 1, 1994, págs. 1-6
• Idioma: inglés
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• Resumen

  • A method for sexing and ageing nestling Goshawks is presented. A discriminant fundion using body mass and the length of the seventh primary, culmen and tarsus lengths allowed sex determination from the age of 15 days, with on accuracy of 94.4%. Age in the first two weeks of life was best determined by tarsus length. Affer 15 days old, the length of the seventh primary can be used to estimate age to within two days.