Asio

Asio
Lang-eared Houlet
Scientific classification
Kinrick: Animalia
Phylum: Chordata
Cless: Aves
Order: Strigiformes
Faimily: Strigidae
Genus: Asio
Brisson, 1760
Species

See text.

Asio is a genus o typical houlets, or true houlets, in the Strigidae faimily. The genus Asio contains the eared houlets, which are characterised bi feather tufts on the heid which gie the appearance o "ears". This group haes representatives ower maist o the planet, an the Short-eared Houlet is ane o the maist widespread o aw bird species, breedin in Europe, Asie, North an Sooth Americae, the Caribbean, Hawaii an the Galápagos Islands. Its geografic range extends tae aw continents except Antarctica an Australie.

These are medium-sized houlets, 30–46 cm (12–18 in) in length wi 80–103 cm (31.5–40 in) wingspans. Thay are lang winged an hae the characteristic facial disc.

The twa northren species are pairtially migratory, movin sooth in winter frae the northren pairts o thair range, or wanderin nomadically in puir vole years in search o better fuid supplies. Tropical Asio houlets are lairgely sedentary.

Asio houlets are mainly nocturnal, but Short-eared Houlets are an aa crepuscular. Maist species nest on the grund, but the Lang-eared Houlet, Asio otus, nests in the auld stick nests o craws, ravens an magpies (faimily Corvidae) an various hawks.

These houlets hunt ower open fields or grasslands, takin mainly rodents, ither smaa mammals an some birds.

Species

Twa fossil species are recognized nouadays:

  • Asio brevipes (Glenns Ferry Late Pliocene o Hagerman, USA)
  • Asio priscus (Late Pliocene o Santa Rosa Island, USA)

The supposed Late Eocene/Early Oligocene eared houlet "Asio" henrici haes been recognized as a member o the fossil barn-houlet genus Selenornis. "Asio" pygmaeus (often misspelt pigmaeus) cannae be assigned tae a genus wioot restudy o the material. "Asio" collongensis (Middle Miocene o Vieux-Collonges, Fraunce) is nou placed in the genus Alasio.(Mlíkovský 2002)

References

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