Hawks and Eagles (Accipitridae)

Grey-backed Hawk (Leucopternis occidentalis) - HBW 2, p. 170

French: Buse à dos gris German: Graurückenbussard Spanish: Busardo Dorsigrís

Taxonomy: Leucopternis occidentalis Salvin, 1876, western Ecuador.
Has been considered a race of L. albicollis, to which it is closely allied; forms superspecies with L. albicollis and L. polionota. Monotypic.

Distribution: W Ecuador and adjacent NW Peru. Single record from E Andean slope now questioned by its authors.