Ear tufts in Ferruginous Pygmy-owl (Glaucidium brasilianum) as alarm response.

SANTILLAN, M. A., J. H. SARASOLA & M. DOLSAN. 2008. Journal of Raptor Research 42:153-155. » Descargar PDF

Can a «wintering area effect» explain population status of Swainson’s hawks?

SARASOLA, J. H., J. J. NEGRO, K. A. HOBSON, G. R. BORTOLOTTI & K. BILDSTEIN. 2008. A stable isotope approach. Diversity & Distributions 14:686-691. » Descargar PDF

Where do Swainson’s hawks winter? Satellite images used to identify potential habitat.

SARASOLA, J. H., J. BUSTAMANTE, J. J. NEGRO & A. TRAVAINI. 2008. Diversity & Distributions 14:742-753. » Descargar PDF

Land-use changes may explain the recent range expansion of the Black-shouldered Kite Elanus caeruleus in southern Europe.

BALBONTIN, J. H., J. J. NEGRO, J. H. SARASOLA, J. J. FERRERO & D. RIVERA. 2008. Ibis 150:707-716. » Descargar PDF
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