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Asio

For other uses, see Asio (disambiguation).

Asio
Temporal range: Late Pliocene to present
Long-eared owl
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Asio
Brisson, 1760
Type species
Strix otus
Linnaeus, 1758
Species

A, grammicus (some place in Pseudoscops)
A. clamator (some place in Pseudoscops or Rhinoptynx)
A. otus
A. abyssinicus
A. madagascariensis
A. stygius
A. flammeus
A. capensis
A. solomonensis

Asio is a genus of typical owls, or true owls, in the family Strigidae. This group has representatives over most of the planet, and the short-eared owl is one of the most widespread of all bird species, breeding in Europe, Asia, North and South America, the Caribbean, Hawaii and the Galápagos Islands. Its geographic range extends to all continents except Antarctica and Australia.

These are medium-sized owls, 30–46 cm (12–18 in) in length with 80–103 cm (31–41 in) wingspans. They are long-winged and have the characteristic facial disc. The two northern species are partially migratory, moving south in winter from the northern parts of their range, or wandering nomadically in poor vole years in search of better food supplies. Tropical Asio owls are largely sedentary. These owls hunt over open fields or grasslands, taking mainly rodents, other small mammals and some birds.

Asio owls are mainly nocturnal, but short-eared owls are also crepuscular. Most species nest on the ground, but the long-eared owl (Asio otus) nests in the old stick nests of crows, ravens and magpies (family Corvidae) and various hawks.

Taxonomy

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.[4]

Species

The genus contains the following nine species:[5]

Genus Asio – Brisson, 1760 – nine species
Common name Scientific name and subspecies Range Size and ecology IUCN status and estimated population
Jamaican owl

Asio grammicus
(Gosse, 1847) 		Jamaica
Map of range 		Size:

Habitat:

Diet: 		 LC 


Striped owl

Asio clamator
(Vieillot, 1808) 		South America and parts of Central America.
Map of range 		Size:

Habitat:

Diet: 		 LC 


Long-eared owl

Asio otus
(Linnaeus, 1758)

Four subspecies
  • A. o. otus (Linnaeus, 1758)
  • A. o. canariensis (Madarász, 1901)
  • A. o. wilsonianus (Lesson, 1830)
  • A. o. tuftsi Godfrey, 1948

Map of range 		Size:

Habitat:

Diet: 		 LC 


Abyssinian owl


Asio abyssinicus
(Guérin-Méneville, 1843) 		Ethiopia and northern Kenya. Size:

Habitat:

Diet: 		 LC 



Madagascar owl

Asio madagascariensis
(A. Smith, 1834) 		Madagascar Size:

Habitat:

Diet: 		 LC 


Stygian owl

Asio stygius
(Wagler, 1832)

Six subspecies
 Mexico, parts of Central America, Cuba, Hispaniola, and 10 countries in South America.
Map of range 		Size:

Habitat:

Diet: 		 LC 


Short-eared owl

Asio flammeus
(Pontoppidan, 1763)

Eleven subspecies
  • A. f. flammeus – (Pontoppidan, 1763)
  • A. f. cubensis – Garrido, 2007
  • A. f. domingensis – (Statius Müller, 1776)
  • A. f. portoricensis – Ridgway, 1882
  • A. f. bogotensis – Chapman, 1915
  • A. f. galapagoensis – (Gould, 1837)
  • A. f. pallidicaudus – Friedmann, 1949
  • A. f. suinda – (Vieillot, 1817)
  • A. f. sanfordi – Bangs, 1919
  • A. f. sandwichensis – (A. Bloxam, 1827)
  • A. f. ponapensis – Mayr, 1933
all continents except Antarctica and Australia
Map of range 		Size:

Habitat:

Diet: 		 LC 


Marsh owl

Asio capensis
(Smith, 1834) 		southern Africa Size:

Habitat:

Diet: 		 LC 


Fearful owl


Asio solomonensis
(Hartert, 1901) 		Solomon Islands archipelago Size:

Habitat:

Diet: 		 VU 



Three fossil species are recognized:

  • † Asio brevipes (Glenns Ferry Late Pliocene of Hagerman, USA)
  • † Asio priscus (Late Pleistocene of San Miguel Island and Santa Rosa Island, USA)[6]
  • † Asio ecuadoriensis (Late Pleistocene of Ecuador)[7][8]

The supposed Late Eocene/Early Oligocene eared owl "Asio" henrici has been recognized as a member of the fossil barn-owl genus Selenornis. "Asio" pygmaeus (often misspelt pigmaeus) cannot be assigned to a genus without restudy of the material. "Asio" collongensis (Middle Miocene of Vieux-Collonges, France) is now placed in the genus Alasio.[9]

References

  1. ^ Brisson, Mathurin Jacques (1760). Ornithologie, ou, Méthode contenant la division des oiseaux en ordres, sections, genres, especes & leurs variétés (in French and Latin). Vol. 1. Paris: Jean-Baptiste Bauche. p. 28.
  2. ^ Peters, James Lee, ed. (1940). Check-list of Birds of the World. Vol. 4. Cambridge, Massachusetts: Harvard University Press. p. 167.
  3. ^ "Definition - Numen - The Latin Lexicon - An Online Latin Dictionary - A Dictionary of the Latin Language". latinlexicon.org.
  4. ^ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 57. ISBN 978-1-4081-2501-4.
  5. ^ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2021). "Owls". IOC World Bird List Version 11.1. International Ornithologists' Union. Retrieved 27 May 2021.
  6. ^ Collins, P. W., D. A. Guthrie, E. L. Whistler, R. L. Vellanoweth, and J. M. Erlandson. 2018. Terminal Pleistocene–Holocene avifauna of San Miguel and Santa Rosa islands: identifications of previously unidentified avian remains recovered from fossil sites and prehistoric cave deposits. Western North American Naturalist 78(3):370–404.
  7. ^ Enrico de Lazaro: Giant Predatory Owls Once Lived in Ecuador; on: sci-news; July 22, 2020
  8. ^ Lo Coco, G.E., Agnolín, F.L. & Román Carrión, J.L.: Late Pleistocene owls (Aves, Strigiformes) from Ecuador, with the description of a new species; In: J Ornithol 161, pp 713–721; March 5, 2020; doi:10.1007/s10336-020-01756-x
  9. ^ Mlíkovský, Jirí (2002): Cenozoic Birds of the World, Part 1: Europe Archived 2011-05-20 at the Wayback Machine. Ninox Press, Prague.
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