The northern hawk-owl or northern hawk owl (Surnia ulula) is a medium-sized true owl of the northern latitudes. It is non-migratory and usually stays within...

Surnia is a genus of owl that contains a single living species, the northern hawk-owl (Surnia ulula). Two fossil species are known as well; Surnia capeki...

species are known as hawk-owls or boobooks, but the northern hawk-owl (Surnia ulula) is not a member of this genus. The genus was introduced by English naturalist...

published in 2019 found that the widely distributed northern hawk-owl (Surnia ulula) is sister to the genus Glaucidium. The genus contains 29 living species:...

range of birds of prey can take stoats, from small northern hawk-owls (Surnia ulula) and short-eared owls (Asio flammeus) to various buzzards, kites, goshawks...

grey wolf (Canis lupus). Birds of the area include northern hawk owl (Surnia ulula), great horned owl (Bubo virginianus), sharp-tailed grouse (Tympanuchus...

jays, including great grey owls (Strix nebulosa), northern hawk-owls (Surnia ulula), and Mexican spotted owls (Strix occidentalis lucida). Canada jay remains...

Miosurnia would have had a body size comparable to the extant strigidaen Surnia ulula (Northern hawk-owl), with an estimated body length (rostrum to pubis)...

owl Athene roseoaxillaris (Hartert, EJO, 1929) 77 Northern hawk-owl Surnia ulula (Linnaeus, 1758) 78 Eurasian pygmy owl Glaucidium passerinum (Linnaeus...

boreal species such as great grey owl, boreal owl and northern hawk owl (Surnia ulula). This eagle-owl reaches its westernmost range in the Iberian Peninsula...