Dot-fronted Woodpecker
Dryobates frontalis
Small greenish woodpecker of the dry and semi-humid forests at the base of the Andes in NW Argentina and southern Bolivia. Male has a red cap, while the female’s head is grayish with pale spots. Distinguished from the very similar Little woodpecker by Dot-fronted’s pale auriculars and pale spots on forehead. Also tends to be less vocal and less gregarious than Little Woodpecker. Calls a quick, full “squit!” given individually or strung together in quick repetition.
识别特征
The dot-fronted woodpecker is about 16 cm (6.3 in) long and weighs 30 to 40 g (1.1 to 1.4 oz). Males and females have the same plumage except on their heads. Males have an olive to gray-brown forehead ("front") with many white spots and are red from the crown to the nape with dark gray feather bases showing through. The female is olive-brown from forehead to nape with white spots throughout. Adults of both sexes have a mostly olive-brown face with a thin white supercilium and a thin white "moustache". Their upperparts are mostly yellowish olive with golden feather tips and pale bars and streaks. Their flight feathers are brown with wide yellow-green edges and pale bars on the inner webs. Their tail is dark brown with a yellow wash and thin whitish bars on the feathers. Their underparts are olive-gray with narrow whitish bars. The iris is dark brown, the longish beak blackish with a paler mandible, and the legs are dark gray. Juveniles are duller and grayer than adults and both sexes have some red on the crown, the male more than the female.
分类信息
The International Ornithological Committee and BirdLife International's Handbook of the Birds of the World place the dot-fronted woodpecker in genus Veniliornis. However, starting in 2018, the American Ornithological Society and the Clements taxonomy moved all species of genus Veniliornis into genus Dryobates. The dot-fronted woodpecker and little woodpecker (V. (or D.) passerinus) sometimes hybridize, and some authors have treated them as conspecific.<p>The taxonomic systems agree that the dot-fronted woodpecker is monotypic.
- 学名
- Dryobates frontalis
- 命名信息
- (Cabanis, 1883)
- 目
- Piciformes
- 科
- Picidae
- 属
- Dryobates
分布与栖息地
The dot-fronted woodpecker is found on the east side of the Andes from Bolivia's Cochabamba and Santa Cruz departments south to Tucumán Province in Argentina. It inhabits dry montane woodland, humid forest, and the transition zone between them. In elevation it ranges as high as 2,000 m (6,600 ft) but generally occurs lower.
- 迁徙
- Resident species
行为
The dot-fronted woodpecker tends to move to lower elevations outside the breeding season.<p>The dot-fronted woodpecker typically forages near the ground on tree trunks and small branches. Its diet has not been described.<p>The dot-fronted woodpecker's breeding season has not been fully defined but appears to include at least September to November. The single known nest cavity was about 8 m (25 ft) above the ground in a dead tree. Nothing else is known about the species' breeding biology.<p>The dot-fronted woodpecker "makes [a] series of 8–10 'juíc!' or 'jíc!' calls, or a rather harsh 'wík!'."
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Arrowhead Warbler
Setophaga pharetra
A small active species found high in moist woodlands. Frequently flicks its tail and often gives impression of being entirely heavily streaked. Blackpoll Warbler can be somewhat similar, but fall birds are tinged with some degree of yellow below, and spring males have a bold white cheek. Black-and-white Warbler is also similar, but it has bold black-and-white stripes (as opposed to distinct streaks as on Arrowhead Warbler) on crown and is usually found creeping along tree trunks or limbs. Call is a hard chip with a slightly squeaky quality. Song is relatively quiet and variable consisting of “tsi” notes; often with two or three introductory notes followed by one or two notes at a lower pitch then several notes at original pitch, given in rapid succession.
Red-cheeked Cordonbleu
Uraeginthus bengalus
Slim, long-tailed, pretty waxbill. The upperparts are pale brown and the underparts and tail blue. Males have a distinctive magenta mark on the cheek. Generally common in a wide variety of open habitat, including dry thornscrub, all types of savanna, villages, and cultivation. Usually in pairs or small flocks. The common call is a high-pitched “tsee-tsee.” In the area of overlap, females are very difficult to separate from Southern Cordonbleu. They tend to show more extensive brown on the cheek, but are most safely identified by association with red-cheeked males.
Forbes-Watson's Swift
Apus berliozi
Brownish, mid-sized swift with powerful, direct flight. The wings are uniform, without significantly contrasting paler patches on the inside of the wings. Nest in caves and crevices, but can be seen in flight over many habitats, especially dry, montane areas. The call is a moderately-pitched descending trill. Very similar to Pallid and Common Swift, and separation is difficult in times and places where they overlap. Slightly darker than Pallid Swift and paler than Common Swift, with subtly different vocalizations. Also similar to African and Nyanza Swifts, but can be separated by the uniform wings without contrastingly pale panels at the base.
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