1990/10/01 by José A. Donázar, Olga Ceballos · 2 citations
Agricultural and Biological Sciences · Environmental Science · #Animal Behavior and Reproduction #Plant and animal studies #Avian ecology and behavior #Nest (protein structural motif) #Population #Zoology #Ecology #Alien #Biology #Geography #Demography #Sociology
paper · doi:10.1111/j.1474-919x.1990.tb00284.x
openalex publication_date 1990/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
In a dense population of Egyptian Vultures Neophron percnopterus in northern Spain, nest‐switching occurred between nearby nests. Fledglings obtained more feeds by intruding and pirating than by remaining in their own nests during the same period. Intruder fledglings showed the same behaviour with Foster adults attacked intruder fledglings significantly less than they attacked alien adults and immatures but more frequently than they attacked their own fledglings. Effective rejection behaviour by foster adults to intruders may not have evolved as Egyptian Vultures usually nest at lower densities than that found in the study area.