- Pseudastur occidentalis
- Blackish-grey upperparts
- Grey head (nape and mantle streaked with white)
It was formerly placed in the genus Leucopternis.
Montane evergreen and semi-deciduous forests. Observed at heights around 1,098 m.
Their diet consists of small birds and rodents, lizards, snakes, frogs, worms and insects.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9., with updates to August 2014. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Handbook of the Birds of the World Alive (retrieved June 2014)
- BF Member observations
- BirdForum Opus contributors. (2023) Gray-backed Hawk. In: BirdForum, the forum for wild birds and birding. Retrieved 30 November 2023 from https://www.birdforum.net/opus/Gray-backed_Hawk