The scientific name is from Latin. The genus name Asio is a type of eared owl, and otus also refers to a small eared owl.[2]
Description
Separation from short-eared owl
Over much of its range, long-eared owls occur with the similar-looking short-eared owl. At rest, the ear-tufts of the long-eared owl serve to easily distinguish the two (although long-eared owls can sometimes hold their ear-tufts flat). The iris-colour differs: yellow in short-eared, and orange in long-eared, and the black surrounding the eyes is vertical on long-eared, and horizontal on short-eared. Overall, the short-eared owl tends to be a paler, sandier bird than the long-eared. There are a number of other ways in which the two species differ which are best seen when they are flying:- short-eared owls often have a broad white band along the rear edge of the wing, which is not shown by long-eared owls;
- on the upperwing, the short-eared owl's primary-patches are usually paler and more obvious;
- the band on the upper side of the short-eared owl's tail are usually bolder than those of the long-eared;
- the short-eared's innermost secondaries are often dark-marked, contrasting with the rest of the underwing;
- the long-eared owl has streaking throughout its underparts whereas on the short-eared the streaking ends at the breast;
- the dark markings on the underside of the tips of the longest primaries are bolder on short-eared owls;
- the upperparts of short-eared owls are coarsely blotched, whereas on the long-eared they are more finely marked;
- the short-eared owl also differs structurally from the long-eared, having longer, slimmer wings: long-eared owls have wings shaped more like those of a tawny owl.[5]
Behaviour
It nests in trees, often coniferous, using the old stick nests of other birds such as crows, ravens and magpies and various hawks. The average clutch size is 4–6 eggs, and the incubation time averages from 25–30 days. It will readily use artificial nesting baskets. An unusual characteristic of this species is its communal roosting in thickets during the winter months. The young have a characteristic call, likened to a rusty hinge.
The long-eared owl hunts over open country by night. It is very long winged, like the similar short-eared owl, and glides slowly on stiff wings when hunting. Its food is mainly rodents, small mammals, and birds. In Europe it faces competition from the tawny owl and is most numerous in localities where the tawny is absent, notably in Ireland, where the long-eared is the dominant owl; it can occasionally be seen even in Dublin city centre, and breeds in the Phoenix Park to the west of the
city.
Range of A. otus
Breeding range Year-round range Wintering range
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.