Plain-crowned Spinetail
Synallaxis gujanensis
Small long-tailed bird of thickets and undergrowth. Light gray with reddish brown wings and tail. Light throat without any black helps distinguish it from similar spinetails. Found around forest edges, as well as around gardens and human dwellings. The most common spinetail over most of its range; often heard singing throughout the day, a repeated “pew … put WEET!”
识别特征
The plain-crowned spinetail is 15 to 17 cm (5.9 to 6.7 in) long and weighs 13 to 22 g (0.46 to 0.78 oz). The sexes have the same plumage. Adults of the nominate subspecies S. g. gujanensis have a faint grayish buff supercilium on an otherwise grayish brown face. Their crown and upperparts are dull brownish that is slightly grayer and darker on the forecrown. Their wings are dark rufous with duller tips on the flight feathers. Their tail is dark rufous; it is graduated and the feathers have pointy tips. Their throat is whitish and their breast, flanks, and undertail coverts are brownish. Their belly is lighter than the rest of their underparts. Their iris is brown to light brown, their maxilla blackish, their mandible gray to pale gray (sometimes with a blackish tip), and their legs and feet olive-gray to greenish yellow or blue-gray. Juveniles have faint dusky scallops on their breast.<p>Subspecies S. g. columbiana has much whiter underparts and grayer (less tawny) flanks than the nominate. S. g. huallagae is darker and grayer than the nominate, with olivaceous flanks. S. g. canipileus is similar to huallagae but with grayer underparts and paler wings and tail. S. g. inornata has richer brown upperparts than the nominate, with a buffier face and much brighter rusty underparts. S. g. certhiola has a grayish face, a somewhat olivaceous back, a buffy white center to the belly, and wings, tail, and underparts that are intermediate between the rather plain nominate and the richly colored inornata.<p>Several of the subspecies intergrade along their contact zones.
分类信息
The plain-crowned spinetail was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the wagtails in the genus Motacilla and coined the binomial name Motacilla gujanensis. Gmelin based his description on "Le rouge-queue de la Guyanne" that had been described and illustrated in 1778 by the French polymath, the Comte de Buffon. The specific epithet gujanensis is from the type locality, the Guianas. The plain-crowned spinetail is one of 37 spinetails in the genus Synallaxis that was introduced in 1818 by Louis Pierre Vieillot.<p>Six subspecies are recognized:<p>What are in 2023 the Araguaia spinetail (S. simoni), the white-lored spinetail (S. albilora), and the Maranon spinetail (S. maranonica) were previously treated as subspecies of the plain-crowned. The four are a monophyletic group.
- 学名
- Synallaxis gujanensis
- 命名信息
- (Gmelin, JF, 1789)
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Synallaxis
分布与栖息地
The subspecies of the plain-crowned spinetail are found thus:<p>The plain-crowned spinetail inhabits a variety of landscapes, most of which are close to water. They include gallery forest, the edges of várzea forest, secondary forest, and scrubby areas with Gynerium cane amid Cecropia woodlands on river islands. It also occurs in the dense regrowth in clearcuts and in plantations. In elevation it is found below 1,200 m (3,900 ft), but reaches only 1,000 m (3,300 ft) in Colombia, 600 m (2,000 ft) in Venezuela, and 400 m (1,300 ft) in Ecuador.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Gray-breasted Spurfowl
Pternistis rufopictus
A large gray-and-brown francolin with bare red skin on the throat and around the eyes. Also note the red bill, the dark gray legs, and the chestnut, buff, and black markings along the sides of the belly. Pale patches in the outer wings are conspicuous in flight. Found in fairly dry thorn savanna, woodland, and thickets, usually in pairs or small groups. Similar to Red-necked Francolin, but there is little overlap in range, and separated by the brown legs and many plumage details. Also similar to Yellow-necked Francolin, but easily separated by the red or sometimes orange (rather than yellow) throat. The call is a fading series of grating “kreaaak” notes.
Arrowhead Piculet
Picumnus minutissimus
Common piculet of coastal forests. Note short-tailed profile, large feet, and cone-shaped bill. Found in mangroves, gardens, abandoned plantations, and disturbed areas. Creeps quietly through vine tangles and bores into dead twigs at lower and middle levels. Similar to Golden-spangled and White-barred Piculets, but Arrowhead has chevron-shaped spots (not barring) on the breast and belly, and is strictly confined to coastal habitats.
Lapland Longspur
Calcarius lapponicus
Sparrowlike ground-dweller; crouches low to the ground and walks with pattering footsteps. Breeding male is gorgeous and unmistakable: yellow bill, black face, broad white eyebrow, and bright rufous nape unlike any other bird. Females and nonbreeding birds are much more subtle. Habitat and habits provide good clues: often in flocks in winter, sometimes mixed with Horned Larks or Snow Buntings, on barren landscapes such as beaches or dirt fields. To separate from other longspurs, look for combination of face pattern, rufous nape, and rufous wing panel with white tips. Breeds on Arctic tundra, where males sing a tinkling warble. Can also be heard giving "teew" notes and rattle calls like Snow Buntings and other longspurs.
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