The retinae were taken from eyeballs of four Strigidae genera: little owl (Athene noctua), tawny owl (Strix aluco), scops owl (Otus scops) and eared owl (Asio otus).

In Europe, barn owl (Tyto alba), long-eared owl (Asio otus), tawny owl (Strix aluco) and to a lesser extent little owl (Athene noctua) are the major avian predators of harvest mouse.

Long-eared Owl (Asio otus) and Northern Saw-whet Owl (Aegolius acadicus) are primarily mammal-eating owls that are widespread across North America.

The long-eared owl (Asio otus) is distributed in temperate regions of North America, Europe, and Asia (Marti, 1976; Holt, 1997; American Ornithologists' Union, 1998; J.

Barred Owls prey on a wide range of species, including birds (Mazur and James 2000), and have been documented taking smaller owls, including the Eastern Screech-Owl (Megascops asio) and Longeared Owl (Asio otus) (Bent 1938; Mazur and James 2000) in other parts of its range.

uralensis (F) 1.0 1.7 1.3 2.3 Asio otus (R) 2.7 3.7 3.0 6.3 A.

juveniles) Species 0 20 40 80 160 320 640 Acrocephalus scirpaceus 1 (1) 0 0 0 0 0 0 Alcedo atthis 4 (1) 0 0 0 0 0 0 Asio otus 1 (1) 0 0 0 0 0 0 Carduelis carduelis 9 (3) 0 0 0 0 0 0 Carduelis chloris 12 (2) 0 0 0 0 0 0 Cettia cetti 19 (4) 0 0 0 0 0 0 Hippolais pallida 49 (17) 0 0 0 0 0 0 Hippolais polyglotta 5 (2) 0 0 0 0 0 0 Luscinia megarhynchos 4 (2) 0 0 0 0 0 0 Oriolus oriolus 1 0 0 0 0 0 0 Passer domesticus 175 (109) 1 1 2 (1) 0 0 0 Pycnonotus barbatus 3 0 0 0 0 0 0 Serinus serinus 9 (3) 0 0 0 0 0 0 Sturnus vulgaris 1 (1) 0 0 0 0 0 0 Sylvia melanocephala 18 (7) 0 0 0 0 0 0 Turdus merula 23 (18) 4 (1) 1 1 0 0 2 * Captured in June (n = 197) and July (n = 149 + 14 recaptured birds first sampled in June); only data for first capture are shown.

columbarius 0 0 Calipepla (Lophortyx) californica 11 24 Meleagris (Parapavo) californicus 136 112 Patagioenas (Columba) fasciata 1 1 Zenaidura macroura Rallus limicola Tringa melanoleuca Tyto alba (Aluco pratincola) 1 0 Strix brea Asio otus (wilsonianus) 0 5 Otus kennicotti (asio) 0 4 Bubo virginianus 20 27 Glaucidium gnoma 0 19 Phalenoptilus nuttalli Melanerpes formicivorus Melanerpes lewisi Colaptes auratis (cafer) 2 23 Sphyrapicus sp.

Comparison of the diet of two desert-living owls, the long-eared owl (Asio otus) and little owl (Athene noctua) from southern Mongolia.

Food habits of the long-eared owl (Asio otus) have been reported from much of North America and Europe (Marti, 1976; Marks et al., 1994).

Long-eared Owls (Asio otus) in Illinois are variously described as an uncommon migrant and occasional winter resident (Bohlen, 1989; DeVore et al., 2004; INHS, 2009).