- Asio stygius
38-46cm (15-18 cm); long erectile ear tufts
- Dark facial disc
- Sooty black back, with some white and buff bars and mottling
- Buff underparts, with black streaks and bars
- Yellow eyes
- Black bill
- Bare toes
- Feathered legs
- Long wings are long
- Relatively short tail
Central America, Caribbean, South America
Central America: from Mexico through parts of Belize and Guatemala to Panama.
Caribbean: Cuba with Isla de Juventud and Hispaniola with Gonave Island.
South America: from Colombia and north-west and south Venezuela, through Ecuador and Peru to Bolivia, and east from those areas to south and central Brazil, Paraguay and north Argentina.
Has occurred twice in southern Texas.
Recent finds have extended the range in Peru where formerly a gap in the distribution was expected.
- A. s. lambi:
- Highlands of western Mexico (south-western Chihuahua to Jalisco)
- A. s. robustus:
- A. s. siguapa:
- Cuba and Isle of Pines
- A. s. noctipetens:
- Hispaniola and Gonâve Island
- A. s. stygius:
- A. s. barberoi:
- Paraguay and northern Argentina
Mountain pine and pine-oak forests, rainforest and low, thorny bush country.
The diet consists almost entirely of bats, birds, rodents, reptiles, crustaceans and insects.
The clutch consists of 2 eggs which are incubated by the female.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Birdforum thread discussing aspects of Stygian Owl biology and range.
- Owl Pages
- Handbook of the Birds of the World Alive (retrieved April 2017)
- BirdForum Opus contributors. (2023) Stygian Owl. In: BirdForum, the forum for wild birds and birding. Retrieved 4 December 2023 from https://www.birdforum.net/opus/Stygian_Owl