Rufous-booted Racket-tail
Ocreatus addae
Tiny cloud forest hummingbird found in the eastern Andes from central Peru to Bolivia. Male’s distinctive tail feathers cross each other and splay out in a V shape. Female can be identified by her small size, buffy thighs and vent, spotted underparts, and white whisker. May overlap with Peruvian Racket-tail in central Peru; male Rufous-booted has a twisted (not straight) tail. Females of the two species look almost identical. Typically feeds at small flowers at forest edge or in clearings, and sometimes visits feeders.
识别特征
All racket-tails have pronounced sexual dimorphism. Only the male has elongated outer rectrices (tail feathers) that have bare shafts with terminal flags. On both the annae and addae racket-tails, those feathers are decurved and cross; the flags are asymmetric ellipses. Male rufous-booted racket-tails are 11 to 15 cm (4.3 to 5.9 in) long including the 5.5 to 6 cm (2.2 to 2.4 in) long outer tail feathers, and weigh 2.5 to 2.7 g (0.088 to 0.095 oz). Females are 7.6 to 9 cm (3.0 to 3.5 in) long and weigh 2.6 to 3.2 g (0.092 to 0.11 oz). Both sexes of annae and addae have greenish upperparts without a glittering forehead, both have a white spot behind the eye, and both have buff leg puffs. Males of annae have a greenish gray throat and a solid green belly. Their tail flags are dark bronzy purple. Females have a white throat and breast heavily spotted with green. Males of addae have a mostly white throat with some green and a white belly with green spots. Their tail flags are greenish black. Like annae, females have a white throat and breast heavily spotted with green.
分类信息
The rufous-booted racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus Ocreatus. However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (O. underwoodii). The IOC and Clements call underwoodii "white-booted racket-tail" and assign five subspecies to it. HBW splits the Peruvian population from O. underwoodii addae as O. underwoodii annae, leaving the former as a Bolivian endemic subspecies. The South American Classification Committee of the American Ornithological Society (SACC) follows the eight-subspecies model of booted racket-tail but has requested a proposal to elevate O. addae, O. annae, and another subspecies to species status.<p>The specific epithet addae honors Mrs. Adda Wilson.
- 学名
- Ocreatus addae
- 命名信息
- (Bourcier, 1846)
- 目
- Caprimulgiformes
- 科
- Trochilidae
- 属
- Ocreatus
分布与栖息地
The annae rufous-booted racket-tail is found on the east slope of the Andes of central and southern Peru. The addae rufous-booted racket-tail is found on the east slope of the Bolivian Andes. The species favors the edges of humid to wet forest but is also found in the forest interior and in more open secondary forest. It is most numerous at elevations between 1,600 and 2,200 m (5,200 and 7,200 ft) but is found as low as 600 m (2,000 ft) and as high as 4,000 m (13,000 ft).
行为
The rufous-booted racket-tail makes seasonal elevational movements after breeding.<p>The rufous-booted racket-tail typically forages between 6 and 18 m (20 and 60 ft) above the ground. It takes nectar from a variety of plants such as those of genera Palicourea, Clusia, Inga, and Cavendishia. Often several birds will feed close together. In addition to feeding on nectar it captures small insects by hawking from a perch.<p>The rufous-booted racket-tail's breeding season has not been studied but might include most of the year. It makes a tiny cup nest of plant fiber and lichen, typically on a horizontal twig 6 to 8 m (20 to 30 ft) above the ground. The female incubates the clutch of two eggs for 16 to 17 days; fledging occurs 19 to 22 days after hatch.<p>Both male and female rufous-booted racket-tails give "a diagnostic, descending, thin sweet trill, 'ti-tlee-ee-ee' [and] single 'tsit' and 'trrt' notes."
照片
分布
鸟叫声
其他鸟类
Dusky Eagle-Owl
Ketupa coromanda
A very large, grayish-brown owl with yellow eyes and distinctive ears. Note the fine barring and dark streaks on the pale underparts, and white patches on the shoulders. In flight, wings and tail are strongly barred below. Perches in tall trees, usually near a water body, where it waits for birds and mammals to pounce upon. The call is a distinctive series of low, guttural notes that increase in volume and speed before trailing off towards the end.
Yellow-lored Tanager
Chlorothraupis frenata
Large and chunky with stout dark bill. Nondescript plumage: entirely olive-green with slightly brighter yellowish throat and upper breast. Namesake yellow lores are not always obvious. Sexes alike. Compare with female Red-crowned Ant-Tanager, which is somewhat more slender and longer-tailed, is duskier brown overall, and has paler legs. Found on the east slope of the Andes from southern Colombia to Bolivia. Small flocks move through lower and middle levels of humid forests in foothills and adjacent lowlands. Often in mixed feeding flocks with other species. Listen for its loud, long-winded song of whistles and chips, along with rolling harsh scold calls.
Cinereous Bunting
Emberiza cineracea
Similar to Ortolan and Cretzschmar's Buntings. Males are faintly-streaked with a yellow-green head. Some populations have a yellow belly while others have a gray-white belly. Females and young lack bright yellow tones and are faintly streaked on the throat and breast. Belly whitish, not orange or buff like Ortolan and Cretzschmar’s Bunting. Breeds on open rocky mountain slopes with scattered bushes. During migration found in a varity of open habitats. Flight call is similar to that of Cretzschmar's Bunting, a sharp "Tzip."
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