- Pseudastur albicollis
47–51 cm (18½-20 in);
- White head, body and underwings
- Black upper wings
- Short black tail with a broad white band
- Black bill
- Yellow legs
The sexes are similar, but females are larger and heavier.
Immature birds have extensive black spotting on the upperparts and dark-streaked whitish underparts.
- ghiesbreghti: White with black markings on the outer primaries, black sub-terminal tail bar, yellow eyes
- costaricensis: Distinct black markings on the wings and tail, brown eyes
- williaminae: Wing feathers heavily marked with black, black streaks on the crown and collar, broader tail band, brown eyes
Formerly included in the genus Leucopternis.
There are four subspecies:
- P. a. ghiesbreghti:
- P. a. costaricensis:
- P. a. williaminae:
P. a. albicollis:
Mature tropical rainforest, up to 1400 m. Sometimes seen in sub.tropical forests. Observed at 151 m in Panama.
Their diet consists of reptiles, large insects and mammals, including snakes, lizards, mice, rats and small opossums
They build a large stick platform nest in a tree. The clutch consists of 1 dark-blotched blue-white egg.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Handbook of the Birds of the World Alive (retrieved Feb 2018)
- BF Member observations
- BirdForum Opus contributors. (2021) White Hawk. In: BirdForum, the forum for wild birds and birding. Retrieved 12 May 2021 from https://www.birdforum.net/wiki/White_Hawk