Megascops asio

• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Common Names

Click on the language to view common names.

Description

Physical Description

Habitat

Mixed woodlands are a favorite place for this little owl, but other habitats include residential and rural areas. This species is nocturnal , being active mostly at night.

Typically found at an altitude of 0 to 2,044 meters (0 to 6,706 feet).[1]

Ecology: List of Habitats : 1.5 Forest - Subtropical/Tropical Dry 1.6 Forest - Subtropical/Tropical Moist Lowland 14.6 Artificial/Terrestrial - Subtropical/Tropical Heavily Degraded Former Forest

Biology

Diet

The diet of these owls include insects, small vertebrates , small mammals, and occasionally birds. This owl hunts from a perch or on the wing, capturing prey when it is seen

Reproduction

The breeding season begins in mid-March, peaks in early-April, and extends until late May. Nesting habitat encompasses a variety of wooded areas, including forests , parks, and residential areas. The nest is usually in a cavity in a snag , a live tree , or a hollow stump . The nest height is variable (4.5-15 m ; 15-50 feet). The female lays 2-8 (usually 4-5) eggs that she incubates incubates for 26 days. The male feeds the female while she is incubating. The female does not go very far from the nest when she is taking a break from incubating. The young are semi-altricial, and fledge about 27 days after hatching . The adults will sometimes bring a live Blind Snake back to the nest. The snake does not appear to bother the young, but instead cleans up any uneaten food or insects living in the nest, reducing parasites and keeping the nest clean.

• Breeding Habitat: Woodland
• Nest Type: Cavity
• Clutch Size: 2-7
• Length of Incubation : 26 days
• Days to Fledge: 27
• Number of Broods: 1

Migration

Nonmigratory

The call of this species is important, because this owl is more often heard than seen. The Eastern Screech Owl has two calls. One call is usually a single trilled note . The other call, a series of whistles that descend in pitch, has been described as an eerie horse whinny.

Taxonomy

Unambiguous Synonyms

1. Otus asio (Linnaeus, 1758)

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 28-Sep-2005.

Similar Species

Northern Saw-Whet Owl, Western Screech Owl

Members of the genus Megascops

There are approximately 78 species in this genus:

M. albogularis (White-Throated Screech-Owl) · M. albogularis albogularis · M. albogularis macabrum · M. albogularis meridensis · M. albogularis obscurus · M. albogularis remotus · M. asio (Eastern Screech Owl) · M. asio aikeni · M. asio asio (Eastern Screech-Owl) · M. asio floridanus · M. asio hasbroucki · M. asio maxwelliae · M. asio mccallii · M. asio naevius · M. atricapilla · M. barbarus (Bearded Screech-Owl) · M. choliba (Tropical Screech-Owl) · M. choliba choliba · M. choliba crucigerus · M. choliba decussatus · M. choliba duidae · M. choliba luctisonus · M. choliba margaritae · M. choliba surutus · M. choliba uruguaiensis · M. choliba wetmorei · M. clarkii (Bare-Shanked Screech-Owl) · M. colombianus (Colombian Screech-Owl) · M. cooperi (Pacific Screech-Owl) · M. cooperi cooperi · M. cooperi lambi · M. flammeolus (Flammulated Owl) · M. guatemalae (Vermiculated Screech-Owl) · M. guatemalae cassini · M. guatemalae dacrysistactus · M. guatemalae fuscus · M. guatemalae guatemalae · M. guatemalae hastatus · M. guatemalae thompsoni · M. guatemalae tomlini · M. hoyi · M. ingens (Rufescent Screech-Owl) · M. ingens ingens · M. ingens venezuelanus · M. kennicottii (Tecolote Occidental) · M. kennicottii aikeni · M. kennicottii bendirei · M. kennicottii cardonensis · M. kennicottii kennicottii (Coastal Western Screech-Owl) · M. kennicottii macfarlanei (Interior Western Screech-Owl) · M. kennicottii quercinus · M. kennicottii saturatus (Puget Sound Screech-Owl) · M. kennicottii suttoni · M. kennicottii vinaceus · M. kennicottii xantusi · M. kennicottii yumanensis · M. koepckeae (Koepcke's Screech-Owl) · M. marshalli (Cloud-Forest Screech-Owl) · M. nudipes (Puerto Rican Screech-Owl) · M. nudipes newtoni · M. nudipes nudipes · M. petersoni (Cinnamon Screech-Owl) · M. roboratus (West Peruvian Screech-Owl) · M. roboratus pacificus · M. roboratus roboratus · M. sanctaecatarinae (Long-Tufted Screech-Owl) · M. seductus (Balsas Screech-Owl) · M. trichopsis (Whiskered Screech-Owl) · M. trichopsis aspersus · M. trichopsis mesamericanus · M. trichopsis trichopsis (Whiskered Screech-Owl) · M. vermiculatus · M. vermiculatus napensis · M. vermiculatus roraimae · M. vermiculatus vermiculatus · M. watsonii (Tawny-Bellied Screech-Owl) · M. watsonii usta · M. watsonii watsonii

More Info

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Further Reading

• A bibliography of birds: with special reference to anatomy, behavior, biochemistry --. by Reuben Myron Strong Chicago: Field Museum of Natural History, 1959 UND url p. 109.
• A first book upon the birds of Oregon & Washington: a pocket guide and pupil's assistant in a study of the more common land birds and a few of the shore and water birds of these states / by William Rogers Lord. Portland, Or.: William Rogers Lod, Office of the J.K. Gill Co., 1902 ENG url p. 271.
• A guide to the birds of New England and eastern New York; containing a key for each season and short descriptions of over 250 species, with particular reference to their appearance in the field, by Ralph Huffmann...with four full page plates by Louis Agas BostonHoughton, Mifflin and company1904. ENG url p. 355.
• A history of the birds of Colorado, by William Lutley Sclater London, Witherby & co., 1912. ENG url p. 205, p. 535.
• A list of the birds of New Hampshire. By Glover M. Allen. Manchester, N.H., Nature Study press, 1903. ENG url p. 106, p. 214, p. 27.
• A manual of North American birds. By Robert Ridgway. Illustrated by 464 outline drawings of the generic characters. Philadelphia, J. B. Lippincott Company, 1887. ENG url p. 261, p. 598, p. 607, p. 611, p. 614, p. 627.
• A popular handbook of the birds of the United States and Canada, by Thomas Nuttall. Boston, Little, Brown, 1903. ENG url p. 424.
• A popular handbook of the ornithology of eastern North America. By Thomas Nuttall. Boston, Little, Brown, and Company, 1896. ENG url p. 424.
• Abstract of proceedings of the Delaware Valley Ornithological Club of Philadelphia. [Philadelphia]Delaware Valley Ornithological Club. ENG url p. 21, p. 28, p. 42.
• Alsop, Fred J. III. Birds of North America - Eastern Region. First American Edition. Smithsonian Handbooks. DK Publishing, Inc. 2001.
• Animal biology; Human biology. Parts II & III of First course in biology, by L.H. Bailey & W.M. Coleman. New York, The Macmillan Co., 1910. ENG url p. 168.
• Annals of Scottish natural history. Edinburgh, D. Douglas. ENG url p. 136.
• Annual report / Entomological Society of Ontario. Toronto, The Society. ENG url p. 24.
• Annual report of the Board of Regents of the Smithsonian Institution. Washington: Smithsonian Institution, -1965. ENG url p. 149, p. 544, p. 56, p. 565, p. 574, p. 796, p. 806, p. 92.
• Annual report of the Commissioners of Fisheries, Game and Forests of the State of New York. [Albany, N.Y.: The Commission, 1896-1900] ENG url p. 140, p. 174.
• Archiv für Naturgeschichte. Berlin: Nicolai, 1835- GER url p. 48.
• Asteroid notes. Northfield, Minn, Goodsell Observatory of Carleton College, 1934-1950. ENG url p. 328, p. 329.
• Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes 2003. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada.
• Banks, R. C., R. W. McDiarmid, and A. L. Gardner 1987. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. Resource Publication, no. 166. United States Department of the Interior Fish and Wildlife Service. Washington, D.C., USA. 79.
• Beitr zur Vogelfauna der Mark Brandenburg. Materialen zu einer Ornithologie der norddeutschen Tiefebene auf Grund eigener Beobachtungen und darauf gegrr Studien. Berlin, Deutsche ornithologische Gesellschaft, 1919. GER url p. 290, p. 291.
• Bird-life: a guide to the study of our common birds / by Frank M. Chapman; with seventy-five full-page colored plates after drawings by Ernest Thompson Seton. New York: D. Appleton, 1901. ENG url p. 192.
• Bird-life; a guide to the study of our common birds, by Frank M. Chapman, with plates and text drawings by Ernest Seton Thompson. New York, D. Appleton & co., 1899. ENG url p. 266.
• BirdLife International. 2000. Threatened Birds of the World. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, U.K.
• BirdLife International. 2004 Threatened Birds of the World 2004. CD-ROM. BirdLife International, Cambridge, U.K.
• Birdcraft: a field book of two hundred song, game, and water birds / by Mabel Osgood Wright. ..; with eighty full-page plates by Louis Agassiz Fuertes. New York: Macmillan Co., c1897. ENG url p. 211, p. 316.
• Birds of Washington and vicinity, including adjacent parts of Maryland and Virginia, by Mrs. L. W. Maynard, with introduction by Florence A. Merriam Washington, D. C., 1898. ENG url p. 200.
• Birds of the United States east of the Rocky Mountains; a manual for the identification of species in hand or in the bush, by Austin C. Apgar. New York, American book company[c1898] ENG url p. 406.
• Birds of village and field: a bird book for beginners, by Florence A. Merriam. Illustrated. Boston, Houghton, Mifflin and company, 1898. ENG url p. 287, p. 403.
• Birds: their photographs and home life / by A. H. Cordier with 145 illustrations from photographs of wild birds, by the author. Philadelphia: Dorrance, c1923. ENG url p. 114.
• Bulletin - United States National Museum. Washington: Smithsonian Institution Press, [etc.];1877-1971. ENG url p. 689, p. 692, p. 697, p. 703, p. 827, p. 832, p. 840, p. 845, p. 851, p. 853, p. 854, p. 871.
• Bulletin de la Société zoologique de France. Paris: La Société, FRE url p. 127.
• Bulletin of the Bird Club of Princeton University. Princeton, N.J.: The Club, 1901. ENG url p. 15, p. 30, p. 51.
• Bulletin of the Museum of Comparative Zoology at Harvard College. Cambridge, Mass.: The Museum, ENG url p. 151, p. 160, p. 230, p. 231, p. 235, p. 94.
• Bulletin of the scientific laboratories of Denison University. Granville, Ohio: [The University], 1885- ENG url p. 137.
• Cassinia. Philadelphia, Delaware Valley Ornithological Club. ENG url p. 14, p. 44, p. 51, p. 51, p. 56, p. 60, p. 72, p. 76, p. 80, p. 84.
• Catalogue of Canadian birds, by John Macoun and James M. Macoun Ottawa, Government printing bureau, 1909. ENG url p. 300.
• Catalogue of scientific papers, 1800-1900. Compiled by the Royal Society of London. London, C.J. Clay and Sons, 1867-1902 [etc.] Cambridge, Cambridge University Press, 1914-25. ENG url p. 138, p. 568, p. 747.
• Catalogue of the Birds in the British Museum. London, 1874-98. ENG url p. 114.
• Check-list and bibliography on the occurrence of insects in birds' nests. Ames, Iowa State College Press[1959] ENG url p. 318, p. 586.
• Check-list of North American birds: according to the canons of nomenclature of the American Ornithologists' Union. [s.l.]: The Union, 1889. ENG url p. 32, p. 33.
• Color key to North American birds, by Frank M. Chapman with upward of 800 drawings by Chester A. Reed, B. S. New York, Doubleday, Page & company, 1903. ENG url p. 141, p. 270, p. 301.
• Ehrlich, P., Dobkin, D., and Wheye, D. (1988). The Birders Handbook: A Field Guide to the Natural History of North American Birds. New York: Simon and Schuster Inc. (info on clutch size, length of incubation, days to fledge and number of broods.)
• Fauna of New England, 11: list of the aves / by Glover M. Allen. Boston: Society of Natural History, 1909. ENG url p. 112.
• Fauna of New England. Boston, Printed for the [Boston] Society [of Natural History] from the Gurdon Saltonstall Fund, 1904-25. ENG url p. 112.
• First report of the state zoist: accompanied with Notes on the birds of Minnesota / by P.L. Hatch, Henry F. Nachtrieb, state zoist. Minneapolis: Geological and Natural History Survey of Minnesota: 1892. ENG url p. 214, p. 458, p. 477.
• Fleas of eastern United States, by Irving Fox Ames, Ia., The Iowa State College Press, 1940. ENG url p. 61, p. 68, p. 69.
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• History of the birds of Kansas. By N. S. Goss. Illustrating 529 birds. Topeka, Kan., G. W. Crane, 1891. ENG url p. 302, p. 347, p. 669, p. 687.
• Ibis. [London]Published for the British Ornithologists' Union by Academic Press. ENG url p. 200, p. 256, p. 388, p. 450, p. 710.
• Journal of the Cincinnati Society of Natural History. Cincinnati: The Society, 1878/79 [i.e. 1878 or 1879]-1945. ENG url p. 115, p. 234.
• Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California Boston, Estes and Lauriat, 1890. ENG url p. 881.
• Les oiseaux de la province le Quebec, par C.-E. Dionne. Quebec, Dussault & Proulx, 1906. FRE url p. 224, p. 410.
• Memoirs of the Nuttall Ornithological Club. Cambridge, Mass.: The Club, 1886- ENG url p. 201, p. 219, p. 343, p. 415.
• Michigan bird life: a list of all the bird species known to occur in the State together with an outline of their classification and an account of the life history of each species, with special reference to its relation t by Walter Bradford Barrows. Lansing: Michigan Agricultural College, 1912. ENG url p. 320, p. 808.
• Naturwissenschaftliche Rundschau: wöchentliche Berichte über die Fortschritte auf dem Gesammtgebiete der Naturwissenschaften. Braunschweig: Druck und verlag von Friedrich Vieweg und Sohn, 1886- GER url p. 67.
• Nests and eggs of North American birds; by Oliver Davie. Columbus [O.]Hann & Adair, 1889. ENG url p. 196, p. 197.
• North American birds eggs, by Chester A. Reed...illustrating the eggs of nearly every species of North American birds. New York, Doubleday, Page & company, 1904. ENG url p. 177, p. 345.
• Novitates Zoologicae. London. url p. 33.
• Occasional papers of the California Academy of Sciences. San Francisco: California Academy of Sciences, ENG url p. 250, p. 347.
• Ornis. Vienna, [1885-1907]. GER url p. 32.
• Ornithologische Monatsberichte. Berlin. GER url p. 68.
• Ornithologist and oist. Pawtucket, R.I. ENG url p. 99.
• Pacific coast avifauna / Cooper Ornithological Club of California. Santa Clara, Calif.: The Club, 1900-1974. ENG url p. 113, p. 128, p. 26, p. 35, p. 64, p. 89.
• Proceedings of the Academy of Natural Sciences of Philadelphia. [Philadelphia, Academy of Natural Sciences of Philadelphia] ENG url p. 128, p. 358, p. 41, p. 480, p. 523, p. 80.
• Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge. Philadelphia: The Society ENG url p. 40.
• Proceedings of the Indiana Academy of Science. Indianapolis, Ind.[s.n.] ENG url p. 136.
• Proceedings of the Nebraska Ornithologists' Union. Lincoln, [1900-15] ENG url p. 100, p. 16.
• Proceedings of the United States National Museum. Washington: Smithsonian Institution Press, [etc.] ENG url p. 107, p. 457, p. 505, p. 637.
• Report of the State Zo©logist. Minneapolis. ENG url p. 214, p. 458, p. 477.
• Report upon natural history collections made in Alaska between the years 1877 and 1881 / by Edward W. Nelson. Ed. by Henry W. Henshaw. Washington, Govt. Print. Off.1887. ENG url p. 25.
• Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc. (Length and wingspan info.)
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Notes

Contributors

• BirdLife International 2004. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 18, 2008.
• BirdLife International 2004. Megascops asio. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. and lt;www.iucnredlist.org and gt;. Downloaded on 21 October 2006.
• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 and ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Brands, S.J. (comp.) 1989-2005. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. [http://sn2000.taxonomy.nl/Taxonomicon/]. Access date: Nov 23, 2005
• Global Biodiversity Information Facility. Accessed March 06, 2008. http://www.gbif.org Mediated distribution data from 3 providers.
• Peterson, Alan P. Zoological Nomenclature Resource. Accessed June 19, 2009.

Data Sources

Accessed through GBIF Data Portal March 06, 2008:

• Avian Knowledge Network: eBird
• Avian Knowledge Network: Great Backyard Bird Count
• Avian Knowledge Network: Project FeederWatch
• Biologiezentrum der Oberoesterreichischen Landesmuseen: Biologiezentrum Linz
• Bird Studies Canada: Ontario Breeding Bird Atlas 1981-1985
• Bird Studies Canada: Ontario Breeding Bird Atlas 2001-2005
• Borror Laboratory of Bioacoustics
• Canadian Biodiversity Information Facility: Provincial Museum of Alberta, Edmonton, AB, Canada. Birds (Aves)
• Canadian Museum of Nature: Canadian Museum of Nature Bird Collection
• Museum of Comparative Zoology, Harvard University: MCZ Ornithology Collection
• Museum of Vertebrate Zoology: Terrestrial vertebrate specimens
• New Brunswick Museum: NBM birds
• Santa Barbara Museum of Natural History: Santa Barbara Musem of Natural History
• UNIBIO, IBUNAM: CNAV/Coleccion Nacional de Aves
• University of Colorado Museum: Zoological specimens
• University of Michigan Museum of Zoology (UMMZ): Bird specimens

Identifiers

• Biodiversity Heritage Library NamebankID: 4823319
• Catalogue of Life Accepted Name Code: ITS-177874
• Global Biodiversity Information Facility Taxonkey: 13718490
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 177874
• IUCN ID: 48511
• Natural Heritage Network Species Identifier: ABNSB01030
• Zipcode Zoo Species Identifier: 162712

Footnotes

1. Mean = 207.600 meters (681.102 feet), Standard Deviation = 247.180 based on 5,005 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

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