Typical Owls (Strigidae)

Stygian Owl (Asio stygius) - HBW 5, p. 240

French: Hibou maître-bois German: Styxeule Spanish: Búho Negruzco

Taxonomy: Nyctalops stygius Wagler, 1832, Minas Gerais, Brazil.
Has been proposed that species be included in Pseudoscops, but recent DNA studies appear to confirm its placement in Asio; very closely related to A. otus. Populations of NW South America usually placed in robustus, sometimes included in nominate; races lambi, noctipetens and barberoi poorly differentiated, possibly not valid. Six subspecies recognized.

Subspecies and Distribution:

lambi R. T. Moore, 1937 - W Mexican highlands (SW Chihuahua to Jalisco).
robustus L. Kelso, 1934 - from S Mexico (Guerrero and Veracruz) discontinuously to NW Venezuela, Colombia and Ecuador.
siguapa (d’Orbigny, 1839) - Cuba and I of Pines.

See all 6 subspecies

lambi R. T. Moore, 1937 - W Mexican highlands (SW Chihuahua to Jalisco).
robustus L. Kelso, 1934 - from S Mexico (Guerrero and Veracruz) discontinuously to NW Venezuela, Colombia and Ecuador.
siguapa (d’Orbigny, 1839) - Cuba and I of Pines.
noctipetens Riley, 1916 - Hispaniola and Ile de Gonâve.
stygius (Wagler, 1832) - from N Brazil S to E Bolivia, NE Argentina and SE Brazil.
barberoi W. Bertoni, 1930 - Paraguay and N Argentina.