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handle: 10261/177986
[ES]: Aunque la competencia interespecífica por los nidos ha sido descrita en varias especies de rapaces, las interacciones intraespecíficas son raramente documentadas. Aquí describimos tres casos de usurpación intraespecífica de los nidos en el quebrantahuesos Gypaetus barbatus y documentamos el caso de distancia más próxima entre nidos de parejas reproductoras (1,02 km) en los Pirineos catalanes. Estas usurpaciones podrían ser una consecuencia de la posible limitación de hábitat óptimo para esta especie que forzaría a las parejas a competir por los sectores de nidificación.
[EN]: Although interspecific competition for nests has been described in several raptor species, intraspecific interactions have rarely been reported. We describe three cases of intraspecific nest usurpation in the threatened bearded vulture Gypaetus barbatus in the Catalonian Pyrenees, where pairs were found nesting as close as 1.02 km apart. These observations could result from limited availability of suitable nesting habitat for this species, with birds being forced to compete for nest sites.
We thank Generalitat de Catalunya and Ministerio de Medio Ambiente for financial support.
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