Nesting association of raptors and Buff-necked Ibis in the Argentinean Patagonia

We observed six species of raptors: Black-chested Buzzard-eagle (Geranoaetus melanoleucus), Cinereous Harrier (Circus cinereus), Red-backed Hawk (Buteo polyosoma), Chimango Caracara (Milvago chimango), Crested Caracara (Polyborus plancus), and Peregrine Falcon (Falco peregrinus), nesting at Buff-nec...

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Bibliographic Details
Published in:Colonial Waterbirds
Main Authors: Donázar, José A., Travaini, Alejandro, Rodríguez, Alejandro, Ceballos, Olga, Hiraldo, Fernando
Format: Article in Journal/Newspaper
Language:English
Published: 1996
Subjects:
Buff
Patagonia
Falco peregrinus
peregrine falcon
Online Access:http://hdl.handle.net/10261/59801
https://doi.org/10.2307/1521813
Description
Summary:We observed six species of raptors: Black-chested Buzzard-eagle (Geranoaetus melanoleucus), Cinereous Harrier (Circus cinereus), Red-backed Hawk (Buteo polyosoma), Chimango Caracara (Milvago chimango), Crested Caracara (Polyborus plancus), and Peregrine Falcon (Falco peregrinus), nesting at Buff-necked Ibis (Theristicus caudatus) colonies in northern Argentinean Patagonia. Four out of these six species preyed upon Buff-necked Ibis nestlings and eggs. Ibis breeding success was not different when raptor species were present or absent from colonies. The association between raptors and ibises could be a consequence of generally low availability of colony sites where raptors are absent. Peer Reviewed

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