Yellow-browed sparrow | |
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Adult, Los Llanos, Venezuela | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Passerellidae |
Genus: | Ammodramus |
Species: | A. aurifrons |
Binomial name | |
Ammodramus aurifrons (Spix, 1825) | |
Synonyms | |
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The yellow-browed sparrow (Ammodramus aurifrons) is a species of bird in the family Passerellidae. First described by Johann Baptist von Spix in 1825, this American sparrow is found across much of the Amazon basin in South America. Its natural habitats are subtropical or tropical moist shrubland, pastureland, and heavily degraded former forest.
When Johann Baptist von Spix first described the yellow-browed sparrow in 1825, he put it in the now-defunct genus Tanagra, believing it to be a tanager. [2] The classification error was soon recognized, and the species was moved first to the genus Ammodramus, then to Myospiza—a genus Robert Ridgway created in 1898 for this and the closely related grassland sparrow. [3] Most taxonomists now subsume Myospiza into Ammodramus. [4] DNA analysis indicates that the yellow-browed sparrow is a sister species to the grassland sparrow, and that these two species make a sister group with the grasshopper sparrow; these three are genetically distinct from the other Ammodramus sparrows. [5] The yellow-browed sparrow has four subspecies, which differ primarily in the extent of yellow on the face and the amount of streaking on the upperparts and crown: [2]
The yellow-browed sparrow is one of nine sparrows in the genus Ammodramus, a name which means "desert runner" or "desert racer" (from the Greek ammos, meaning "desert" and -dromos, meaning "-racer" or "-runner"). [7] The species name aurifrons is a combination of the Latin words auri, meaning "gold" and frons, meaning "forehead" or "front". [8]
The yellow-browed sparrow is a small American sparrow, measuring 13 cm (5 in) in length, [9] with a mass between 14.5 and 19 g (0.5 and 0.7 oz). [10] Sexes are similarly plumaged, though males average very slightly larger than females. [2] The adult is brownish gray on the upperparts, with dusky streaks on the back. [9] Its underparts are whitish, shading to grayish on the chest and buff on the flanks. Its legs are pinkish-brown, while the beak is horn-colored, with a darker culmen. Its iris is reddish brown. [2] The juvenile, which has no yellow on its face or wings, is buffier than adults are, with thin brownish streaks on its breast and flanks. [2]
Although quite similar to the grassland sparrow, the yellow-browed sparrow typically shows more yellow on its face. It is overall paler and less streaked than the grassland sparrow, and lacks chestnut edges to its flight feathers. It is best told by its buzzy song, its less secretive behavior and less restrictive habitat preferences. [11]
Although its former habitat was largely along rivers and on islands, the yellow-browed sparrow is now widespread in grassy areas of the Amazon biome, including agricultural fields, roadsides and around towns. [9] It is generally found in the lowlands, though it has been recorded to 1,000 m (3,281 ft) on the east side of the Andes, and regularly as high as 1,500 m (4,921 ft) — and sometimes to 2,000 m (6,562 ft) — in Ecuador. [2]
The yellow-browed sparrow is generally easier to see than its sister species is. It is less secretive, and is found in a wider range of grasslands. [2]
Like most American sparrows, the yellow-browed sparrow is largely granivorous, feeding on the seeds of native grasses and various introduced plants. [12] It also eats insects, including larvae. [2] It typically feeds on the ground. [9]
Breeding has been recorded between February and September. The yellow-browed sparrow builds a cup nest of dried grass lined with fine plant material. The nest is generally on the ground in a grass clump, though sometimes it is placed low in a shrub. The female lays 2–3 white eggs. [2]
The yellow-browed sparrow's high-pitched song is described as "insect-like". [2] Monotonous and buzzy, it is transcribed as tic, tzzz-tzzzzz, [11] with the first note weak and short. [2] The male sings throughout the day from a low, exposed perch. [2] [11]
Because of its very large range and apparently stable population, the yellow-browed sparrow has been designated by the International Union for Conservation of Nature (IUCN) as a species of least concern. It is described as common throughout its range, though its numbers have not been quantified. [1] This species has benefited from the clearing of rainforest for agriculture and cattle ranching; it is common in early successional fields. [13]
Richard's pipit is a medium-sized passerine bird which breeds in open grasslands in the East Palearctic. It is a long-distance migrant moving to open lowlands in the Indian subcontinent and Southeast Asia. It is a rare but regular vagrant to western Europe.
The yellow-breasted bunting is a passerine bird in the bunting family Emberizidae that is found across the Boreal and East Palearctic. The genus name Emberiza is from Old German Embritz, a bunting. The specific aureola is Latin for "golden". The bird's call is a distinctive zick, and the song is a clear tru-tru, tri-tri.
The grasshopper sparrow is a small New World sparrow. It belongs to the genus Ammodramus, which contains three species that inhabit grasslands and prairies. Grasshopper sparrows are sometimes found in crop fields and they will readily colonize reclaimed grassland. In the core of their range, grasshopper sparrows are dependent upon large areas of grassland where they avoid trees and shrubs. They seek out heterogenous patches of prairie that contain clumps of dead grass or other vegetation where they conceal their nest, and also contain barer ground where they forage for insects, spiders, and seeds. Grasshopper sparrows are unusual among New World sparrows in that they sing two distinct song types, the prevalence of which varies with the nesting cycle. The primary male song, a high trill preceded by a stereotyped series of short chips, is reminiscent of the sounds of grasshoppers and is the origin of this species' name. Like some other birds of the central North American grasslands, this species also moves around a lot, not only via annual migrations, but individuals frequently disperse between breeding attempts or breeding seasons. Grasshopper sparrows are in steep decline across their range, even in the core of the breeding distribution in the tallgrass prairies of the central Great Plains. The Florida grasshopper sparrow is highly endangered.
Henslow's sparrow is a passerine bird in the family Passerellidae. It was named by John James Audubon in honor of John Stevens Henslow. It was originally classified in the genus Emberiza and called Henslow's bunting.
LeConte's sparrow, also known as LeConte's bunting, is one of the smallest New World sparrow species in North America.
Baird's sparrow is a species of North American birds in the family Passerellidae of order Passeriformes. It is a migratory bird native to the United States, Canada, and Mexico.
The grassland yellow finch is a small passerine bird. Despite its name, it is not a finch, but is a seedeater. These were formerly united with the buntings and American sparrows in the Emberizidae, but are now known to be tanagers.
The rufous-crowned sparrow is a small American sparrow. This passerine is primarily found across the Southwestern United States and much of the interior of Mexico, south to the transverse mountain range, and to the Pacific coast to the southwest of the transverse range. Its distribution is patchy, with populations often being isolated from each other. Twelve subspecies are generally recognized, though up to eighteen have been suggested. This bird has a brown back with darker streaks and gray underparts. The crown is rufous, and the face and supercilium are gray with a brown or rufous streak extending from each eye and a thick black malar streak.
Cassin's sparrow is a medium-sized sparrow.
New World sparrows are a group of mainly New World passerine birds, forming the family Passerellidae. They are seed-eating birds with conical bills, brown or gray in color, and many species have distinctive head patterns.
The Andean siskin is a species of finch in the family Fringillidae. It is found in Colombia, Ecuador, and Venezuela. Its natural habitats are subtropical or tropical moist montane forests, subtropical or tropical high-altitude shrubland, subtropical or tropical high-altitude grassland, and heavily degraded former forest.
The grassland sparrow is a species of bird in the family Passerellidae. It is found in Argentina, Bolivia, Brazil, Colombia, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela. Its natural habitats are dry savannah, subtropical or tropical seasonally wet or flooded lowland grassland, and pastureland.
The cuckoo-finch, also known as the parasitic weaver or cuckoo weaver, is a small passerine bird now placed in the family Viduidae with the indigobirds and whydahs. It occurs in grassland in Africa south of the Sahara. The male is mainly yellow and green while the female is buff with dark streaks. They lay their eggs in the nests of other birds.
The many-striped canastero is a species of passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Colombia, Ecuador, and Peru.
The scarlet-breasted fruiteater is a species of bird in the family Cotingidae. It is found in Bolivia, Ecuador, and Peru where its natural habitat is subtropical and tropical moist montane forests. Two subspecies are recognised though some researchers consider these should be regarded as distinct species. It is a plump green bird with a black head, the males having red throats and the females yellow. It is a relatively common species with a wide range, and the International Union for Conservation of Nature has rated its conservation status as being "least concern".
The white-browed robin is a species of bird in the family Petroicidae. It is endemic to north-eastern Australia. Its natural habitats are forest, woodland and scrub, often near water. It formerly included the buff-sided robin as a subspecies.
The bar-breasted piculet is a species of bird in subfamily Picumninae of the woodpecker family Picidae. It is found in Bolivia, Brazil, Colombia, and Peru.
Picumnus is a large genus of piculets. With a total length of 8–10 cm (3–4 in), they are among the smallest birds in the woodpecker family. All species are found in the Neotropics except the speckled piculet that has a wide distribution in China, India and Southeast Asia.
The saltmarsh sparrow is a small New World sparrow found in salt marshes along the Atlantic coast of the United States. At one time, this bird and the Nelson's sparrow were thought to be a single species, the sharp-tailed sparrow. Because of this, the species was briefly known as the "saltmarsh sharp-tailed sparrow." Saltmarsh sparrow numbers are declining due to habitat loss largely attributed to human activity.