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The northern saw-whet owl has vertically asymmetrical ears and different shapes of the ear openings. Because the sound reaches the ears at a different time and is of different intensity, the northern saw-whet owl can very precisely localize its prey. Such accurate sound localization allows it to hunt in complete darkness by hearing alone.
Sound localization is an animal’s ability to identify the origin of a sound in distance and direction. [3] Several owl species have ears that are asymmetrical in size and location, which enhances this ability. These species include barn owls (Tyto alba), northern saw-whet owls (Aegolius acadicus), and long-eared owls (Asio otus).
One exception is the even smaller northern saw-whet owl, on which eastern screech owls have been known to prey. [4] In rural Michigan , 9 different species of owls and diurnal raptors including the screech owl fed primarily on the same four species of small rodents from the Peromyscus and Microtus genera. [ 30 ]
The northern saw-whet owl is the smallest owl species found in Wisconsin. Due to its reclusive, nocturnal habits, it's little known and rarely seen. Smith: Saw-whets, Wisconsin's smallest owl, are ...
One of Ohio's most charismatic little hooters is the northern saw-whet owl. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 ...
Strix otusLinnaeus, 1758. The long-eared owl (Asio otus), also known as the northern long-eared owl[ 3 ] or, more informally, as the lesser horned owl or cat owl, [ 4 ] is a medium-sized species of owl with an extensive breeding range. The genus name, Asio, is Latin for "horned owl", and the specific epithet, otus, is derived from Greek and ...
Left column from top, Strigidae: Tawny owl (Strix aluco), Eurasian eagle-owl (Bubo bubo), Little owl (Athene noctua), Northern saw-whet owl (Aegolius acadicus).Right column from top, Tytonidae: Barn owl (Tyto alba), Lesser sooty owl (Tyto multipunctata), Tasmanian masked owl (Tyto novaehollandiae castanops), Sri Lanka bay owl (Phodilus assimilis).
Although some species such as snowy owls, northern saw-whet owls, long-eared and short-eared owls are true migrants, most North American owls are not migratory and will generally show fidelity to a single territory year around. [6] In great horned owls, mated pairs occupy territories year-round and long-term.