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1 December 2009 Natal Dispersal and Recruitment of Two Bonelli's Eagles Aquila fasciata: a Four-Year Satellite Tracking Study
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Abstract

To study natal dispersal and recruitment to the breeding population in Bonelli's Eagle, two nestlings were tagged with satellite transmitters in the Iberian Peninsula in 2002. Their monthly ranges and distances were computed and fitted to regression models to describe their general trend. One bird, a female, dispersed and settled rapidly in an area which she explored intensively during four years and which finally became her first breeding site. The natal dispersal distance was 441 km, and the bird cannot therefore be considered philopatric. The other bird, a male, alternated between long travelling episodes and settlement in particular areas, exploring different regions both distant from and close to his natal territory, but no breeding attempt could be confirmed after four years of tracking. The large distances we recorded confirm the potential for gene flow among populations but, in comparison with our results from previous studies, they suggest that Bonelli's Eagles may show high variation in their natal dispersal distances and use different dispersal strategies.

Luis Cadahía, Pascual López-López, Vicente Urios, Álvaro Soutullo, and Juan J. Negro "Natal Dispersal and Recruitment of Two Bonelli's Eagles Aquila fasciata: a Four-Year Satellite Tracking Study," Acta Ornithologica 44(2), 193-198, (1 December 2009). https://doi.org/10.3161/000164509X482777
Received: 1 January 2009; Accepted: 1 September 2009; Published: 1 December 2009
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