The sage thrasher (''Oreoscoptes montanus'') is a medium-sized

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped') which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their ...

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

from the family Mimidae, which also includes

mockingbird Mockingbirds are a group of New World passerine birds from the family (biology), family Mimidae. They are best known for the habit of some species Mimicry, mimicking the songs of other birds and the sounds of insects and amphibians, often loudly ...

s, tremblers, and New World catbirds. It is the only member of the genus ''Oreoscoptes''. This seems less close to the

Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...

thrashers, but rather to the mockingbirds instead (Hunt ''et al.'' 2001, Barber ''et al.'' 2004).

Description

''Oreoscoptes montanus'' are pale grey-brown on the upperparts and white with dark streaks on the underparts. They have a slim straight relatively short bill, yellow eyes and a long tail, although not as long as that of other

thrasher Thrashers are a New World group of passerine birds related to mockingbirds and New World catbirds. Like these, they are in the family Mimidae. There are 15 species in one large and 4 monotypic genera. These do not form a clade but are a phe ...

s. Measurements: * Length: 7.9-9.1 in (20-23 cm) * Weight: 1.4-1.8 oz (40-50 g) * Wingspan: 12.6 in (32 cm)

Breeding

As its name suggests, this bird breeds in western

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

, from southern

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

to northern

Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...

and

New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...

. Its breeding

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

is in areas with dense stands of

sagebrush Sagebrush is the common name of several woody and herbaceous species of plants in the genus ''Artemisia (plant), Artemisia''. The best-known sagebrush is the shrub ''Artemisia tridentata''. Sagebrush is native to the western half of North Amer ...

and rarely in other shrubby areas. Their nests are made of twigs, rootlets and bark strips, lined with fine rootlets. The female lays 4 or 5

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the ...

s in a twiggy

cup nest A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian bl ...

built in a low bush. Both parents incubate and feed the young birds.

Migrating

In winter, these birds

migrate Migration, migratory, or migrate may refer to: Human migration * Human migration, physical movement by humans from one region to another ** International migration, when peoples cross state boundaries and stay in the host state for some minimum le ...

to the southernmost

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

and

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

, including the Baja Peninsula, north and south.

Diet

They mainly eat

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

s in summer; they also eat

berries A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone fruit, stone or pit (fruit), pit although many wikt:pip#Etymology 2, pips or seeds may be p ...

, especially in winter. They usually search for insects on the ground in brushy locations.

Vocalization

The male bird sings a series of warbled notes to defend his nesting territory.

Conservation

These birds have declined in some areas where sagebrush has been removed but are still common where suitable habitat remains. The continued decline of sagebrush habitats in western North America is cause for alarm for this and other sagebrush dependent species.

References

*Barber, Brian R.; Martínez-Gómez, Juan E. & Peterson, A. Townsend (2004): Systematic position of the Socorro mockingbird ''Mimodes graysoni''. '' J. Avian Biol.'' 35: 195–198. (HTML abstract) *Hunt, Jeffrey S.; Bermingham, Eldredge; & Ricklefs, Robert E. (2001): Molecular systematics and biogeography of Antillean thrashers, tremblers, and mockingbirds (Aves: Mimidae). ''

Auk Auks or alcids are birds of the family Alcidae in the order Charadriiformes. The alcid family includes the Uria, murres, guillemots, Aethia, auklets, puffins, and Brachyramphus, murrelets. The family contains 25 extant or recently extinct speci ...

'' 118(1): 35–55. DOI:10.1642/0004-8038(2001)118 035:MSABOA.0.CO;2HTML fulltext without images

External links

- Cornell Lab of Ornithology

- USGS Patuxent Bird Identification InfoCenter

VIREO * ttp://ibc.hbw.com/ibc/phtml/especie.phtml?idEspecie=5800 Sage Thrasher videoson the Internet Bird Collection
Photo and description
-

Utah Division of Wildlife Resources The Utah Division of Wildlife Resources (UDWR) is part of the Utah Department of Natural Resources for the state of Utah in the United States. The mission of the Division of Wildlife Resources is to serve the people of Utah as trustee and guard ...

{{Authority control

sage thrasher The sage thrasher (''Oreoscoptes montanus'') is a medium-sized passerine bird from the family Mimidae, which also includes mockingbirds, tremblers, and New World catbirds. It is the only member of the genus ''Oreoscoptes''. This seems less clo ...

Native birds of Western Canada Native birds of the Canadian Prairies Native birds of the Western United States Birds of the Great Basin