Female Egyptian vultures have lower survival and start breeding earlier than males in Central-North Spain

Photo: Bruno Berthémy/VCF

Ana Sanz-Aguilar and co-authors have research the effect of age and sex on recruitment, breeding success and adult survival of the globally endangered Egyptian vulture in North-Central Spain during 31 years. Their results were recently published in the journal Scientific Reports, and show that the mean age of first reproduction was 7-yrs for both sexes, but females showed tendency for earlier breeding. Perhaps most surprisingly, they found that old males (≥8 yrs) showed a higher survival than both young males (≤7 yrs) and females (no age effects for females on survival).
 

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