Crested Spinetail
Cranioleuca subcristata
Distinctive small, bicolored bird, with a mostly pale olive-brown body, short crest, rufous wings, and long spiky rufous tail. Crown has narrow black stripes; bill pinkish and decurved. Very arboreal, actively foraging by hitching up branches and tree trunks, as well as by checking leaves and bromeliads. Often with mixed-species flocks. Common, mainly in foothills and lower montane regions. Usually in humid forest, tall secondary forest, and forest borders. Very vocal, the song an accelerating series of short, high notes.
识别特征
The crested spinetail is 14 to 15 cm (5.5 to 5.9 in) long and weighs about 14 g (0.49 oz). It is a long-billed member of genus Cranioleuca but despite its name has only a very slight crest. The sexes have the same plumage. Adults of the nominate subspecies have a faint whitish brown supercilium on an otherwise dull brownish face. Their crown is indistinctly striped with light and dark brown, and their back, rump, and uppertail coverts are brown. Their tail and wings are dark rufous with dark fuscous tips on the flight feathers. Their chin is whitish buff and their throat and underparts dull tawny-brownish. Their iris is chestnut to cream, their maxilla brownish pink, their mandible yellowish to pinkish, and their legs and feet yellowish pink to greenish yellow. Juveniles are grayer than adults and have more mottled underparts and a rufescent tinge to the sides of the crown. Subspecies C. s. fuscivertex has blacker and more prominent stripes on the crown than the nominate.
分类信息
The crested spinetail has two subspecies, the nominate C. s. subcristata (Sclater, PL, 1874) and C. s. fuscivertex (Phelps, WH & Phelps, WH Jr, 1955).
- 学名
- Cranioleuca subcristata
- 命名信息
- (Sclater, PL, 1874)
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Cranioleuca
分布与栖息地
The nominate subspecies of the crested spinetail is the more widely distributed of the two. It is found in much of northwestern Venezuela and adjacent northeastern Colombia, and separately in northeastern Venezuela. Subspecies C. s. fuscivertex is found in the Serranía del Perijá that straddles the Colombia-Venezuela border. The species primarily inhabits montane evergreen forest. In Venezuela's Maracaibo Basin it locally occurs in lowland tropical evergreen forest. It also occurs in mature secondary forest and plantations. In elevation it ranges between 50 and 1,950 m (160 and 6,400 ft) though in Colombia it is scarce in lowlands.
- 迁徙
- Resident species
行为
The crested spinetail is a year-round resident throughout its range.<p>The crested spinetail feeds on arthropods. It typically forages singly or in pairs and often joins mixed-species feeding flocks. It acrobatically gleans prey from bark and debris as it hitches and climbs along small branches from the forest's mid-storey to its subcanopy.<p>The crested spinetail breeds between January and June in northern Venezuela; its season elsewhere has not been defined. It is thought to be monogamous. Its nest is a globe made mostly of grass, with an entrance near the bottom, and suspended from the end of a branch. Nothing else is known about its breeding biology.<p>The crested spinetail's song is "3 high, shrill notes followed by chattery descending trill, 'pzeep, pzeep, pzeep, pee-pee-pe-e-e-e' " and its calls "a sharp 'tsink' [and a] low rattle".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Rusty Blackbird
Euphagus carolinus
Rusty edges to feathers and pale eyebrow in winter contrast with blackish feather bases. Breeding males are glossy black. Shorter tail than Common Grackle. Thinner bill than Red-winged Blackbird. Found in wooded swamps. Often in flocks; frequently mixes with Red-winged Blackbirds and Common Grackle in winter. Look for flocks perched at tops of trees bordering marshes and listen for their calls to help pick them out from large flocks of blackbirds.
Yellow-bellied Elaenia
Elaenia flavogaster
Rather bulky small flycatcher, widespread in tropical lowlands. Fairly common in overgrown brushy clearings, savannas, and other semi-open areas with scattered bushes. Looks like many other small flycatchers, and where multiple species of elaenias occur it is often not possible to identify birds to species. On Yellow-bellied, note its spiky, white-based crest (rarely held flattened), burry drawled call, whitish wingbars, and pale yellow belly; does not flick its wings or tail.
White-breasted Nuthatch
Sitta carolinensis
The largest nuthatch in North America, with distinctive white face, black cap, and blue-gray upperparts. Also note rusty lower belly and undertail coverts. Females have a slightly paler crown than males. Fairly common and widespread, usually in mature woodlands with large trees. Creeps along tree trunks and branches, often upside-down. Sometimes joins mixed flocks with other songbirds. Visits feeders. Listen for insistent yammering calls. Some subtle variation across range, mainly in the darkness of the sides and back, width of the black crown, and vocalizations.
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