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The ear tufts are usually dusky in front and paler tawny on the back. Long-eared owl possess a blackish bill color while its eyes may vary from yellowish-orange to orange-red, tarsi and toes feathered. [4] [8] [36] The long-eared owl is a medium-sized owl, which measures between 31 and 40 cm (12 and 16 in) in total length.
The genus Asio was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the long-eared owl (Asio otus) as the type species. [1] [2] The genus name is from asiō, the Latin name used by Pliny the Younger for a type of horned owl, [3] the feather tufts on the head of these owls give the appearance of "ears" which is a defining characteristic.
Eleven species have been recorded in Ohio. Eastern screech-owl, Megascops asio (B) Great horned owl, Bubo virginianus (B) Snowy owl, Bubo scandiacus; Northern hawk owl, Surnia ulula (R) Burrowing owl, Athene cunicularia (R) Barred owl, Strix varia (B) Great gray owl, Strix nebulosa (R) Long-eared owl, Asio otus; Short-eared owl, Asio flammeus
Their study concluded that these owls could adapt depending on the prey and also with the other predators in the areas where they live. Engel et al. (2015) in Chain O'Lakes State Park, Illinois, during the winter of 1987–88, compared northern saw-whet owls to long-eared owls. Engel confirmed the saw-whet owl's strong preference for small mammals.
In two other species of owls with asymmetrical ears, the saw-whet owl and the long-eared owl, the asymmetry is achieved by different means: in saw whets, the skull is asymmetrical; in the long-eared owl, the skin structures lying near the ear form asymmetrical entrances to the ear canals, which is achieved by a horizontal membrane. Thus, ear ...
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The Abyssinian owl has dark brown eyes, a black bill and gray eyebrows. It is similar in appearance to the long-eared owl, Asio otus, but their ranges do not overlap, and the Abyssinian owl is darker. It has prominent dark brown, white-edged ear-tufts that are slightly centrally located on the head. [4] [5]
In central Lithuania, tawny and long-eared owls took common voles (Microtus arvalis) than were 24% heavier on average than those encountered in the wild, which averaged 16.45 g (0.580 oz) (thus including younger voles). More surprisingly, the long-eared owls were taking voles averaging some 9% larger than those taken by tawny owls. [50]