- 13.8–15.7 in
- 35.4–39.4 in
- 7.8–15.3 oz
- Hibou moyen-duc (French)
- Buho chico (Spanish)
- It has been shown under controlled conditions that the Long-eared Owl can catch mice in complete darkness.
- Like some other owls, the Long-eared Owl has asymmetrical ear openings: the left ear opening is higher than the right. This positioning helps the bird to locate prey by sound.
- The hoot of the male Long-eared Owl can sometimes be heard up to 1 kilometer (0.7 mi) away.
Dense vegetation adjacent to open grassland or shrubland, and open forests.
Small mammals; sometimes birds.
- Clutch Size
- 2–10 eggs
- Egg Description
- Condition at Hatching
- Helpless, eyes closed, covered in white down.
Uses stick nests built by other bird species, including Black-billed Magpie, American Crow, and hawks. In rare cases, nests in cavities.
Hunts almost exclusively at night. Flies low over open ground, locating prey by ear. Kills prey with a bite to the back of the skull; often swallows prey whole.
Listed as Endangered in Illinois, Threatened in Iowa, and as a species of special concern in several states. Habitat loss from land development is the probable cause of declines in California and New Jersey.
- Marks, J. S., D. L. Evans, and D. W. Holt. 1994. Long-eared Owl (Asio otus). In The Birds of North America, No. 133 (A. Poole and F. Gill, Eds.). Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists' Union.