Subspecies
- Asio flammeus bogotensis; along Andes Mountains of Colombia, Ecuador and northwestern Peru
- Asio flammeus domingensis; Hispaniola
- Asio flammeus flammeus; North America, Europe, Asia, northern Africa
- Asio flammeus galapagoensis; Galapagos Islands
- Asio flammeus pallidicaudus; northern Venezuela and Guyana
- Asio flammeus ponapensis; Caroline Islands (Pohnpei)
- Asio flammeus portoricensis; Puerto Rico
- Asio flammeus sandwichensis; Hawaiian Islands
- Asio flammeus sanfordi; Falkland Islands
- Asio flammeus suinda; southern Peru to Bolivia, southeastern Brazil and Tierra del Fuego
References