Black-breasted Puffleg
Eriocnemis nigrivestis
Rare and critically endangered hummingbird endemic to Ecuador. Known only from a few mountains west and north of Quito. Male is dark bluish-green with white leg puffs and a blue vent. Female is brighter green with a golden tinge and has a blue throat patch and vent. Might be mistaken for the larger Sapphire-vented Puffleg but lacks blue on crown and has a shorter tail. Inhabits high elevation forest, where it feeds on small, tubular flowers. Most often encountered in the Yanacocha Reserve; occasionally visits feeders.
识别特征
The species reaches a length of 8–9 cm. It is sexually dimorphic, with the male having black upper- and underparts, dark blue tail coverts, and a violet-blue throat and undertail-coverts. The female is bronze-green above, bluish-green on rump and uppertail-coverts, golden-green underparts and a pale blue chin. Both sexes have a straight black bill, a forked tail and white pufflegs, from which the common name is derived.<p>There is no characteristic vocalization; the species is generally quite silent, but may on occasion emit a monotonous and metallic "tseet tseet tseet" when it flies away.
分类信息
- 学名
- Eriocnemis nigrivestis
- 命名信息
- (Bourcier & Mulsant, 1852)
- 目
- Caprimulgiformes
- 科
- Trochilidae
- 属
- Eriocnemis
分布与栖息地
The black-breasted puffleg is endemic to north-western Ecuador, where it currently appears restricted to the ridge crests of the Pichincha Volcano, the Cordillera de Toisán, Esmeraldas and Imbabura. Based on possible sightings in 1983 and 2010, it may still occur on Atacazo. Unconfirmed sightings exist for several other locations. It may be seen on the Reserva Yanacocha, just outside of Quito, managed by the Fundación Jocotoco. The species occurs in humid and wet cloud and montane forest at altitudes of 1,700-3,500 m.
- 迁徙
- Resident species
行为
Like most hummingbirds, the species primarily feeds on nectar and insects. It follows a seasonally changing feeding pattern based on available blooms (mostly ericas and fuchsias). Areas of forest with a high number of nectar-containing flowers will be heavily defended against other hummingbirds.<p>In breeding season, the male performs short display flights in front of the female. The species is not monogamous, and males can copulate with several females in the same breeding season. The construction of the nest, the incubation and the care of the chicks are the responsibility of the female. The nest consists of moss and fibers, together with some animal fur and feathers. Some nests are built with spiders webs and others sticky materials, which allow the nest to stretch itself to twice its original size as the chicks grow. It is normally placed on low horizontal branches.<p>Two white eggs are usually incubated. The mother feeds them (by regurgitating) mostly on insects, as nectar does not contain enough protein to sustain chick growth. A nesting female can catch up to 2,000 insects per day. The chicks leave the nest after 20 days. The birds are altitudinal migrants, generally being found at altitudes of 2850–3500 m between April and September, but remaining above 3100 m during the breeding season from November to February.<p>The black-breasted puffleg's response to microhabitats variations is extremely sensitive. It has been suggested that the species is under competitive disadvantage for the same ecological niche with others hummingbird species, specifically the Gorgeted sunangel, and that avoidance of forest borders is used to mitigate the stress imposed by the seasonal altitudinal migrations.
保护状况
The species is classified as Endangered by the IUCN based on its restricted range and extremely low population numbers. A 2015 assessment estimated a total number of 210-268 individuals (of which roughly 140-180 would be adults), and the population is believed to have shrunk by 10-20% per decade in the recent past. Although the black-breasted puffleg has recently been rediscovered in small populations outside its main range on the Pichincha volcano, its total area of occurrence is estimated as no larger than 80 km2. Of the habitat in its original range, 93-97% are considered to have been degraded or destroyed by agricultural expansion, logging and cattle grazing, and these practices remain the main threats to the species, together with natural and human-induced fires.<p>A primary source of habitat loss has been the construction of the Oleoducto de Crudos Pesados (OCP) for oil transportation, a route that was established through one of the last remnants of forest.<p>On June 23, 2005, the Municipality of Quito adopted the black-breasted puffleg as the emblem of the capital city.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Katanga Masked-Weaver
Ploceus katangae
This red-eyed masked-weaver has a plain olive-green back and pink-brown legs. The breeding male has a black face mask, with the black band on the forehead above the bill varying from broad in the south to narrow farther north. Female and juvenile are dull and inseparable from other masked-weavers. Pairs and colonies are localized residents of reedbeds, wetlands and adjacent woodland, in a narrow global range between northeastern Zambia and southeastern DRC. The breeding males of Katanga and Southern masked-weavers are very similar, but the former are smaller, have some saffron around the masks, and have darker green backs and rumps; breeding male Tanganyika and Lake Lufira Masked-Weavers have more burnt-orange around the face and underparts, and ranges do not overlap.
Olive Sunbird
Cyanomitra olivacea
Large, dark, olive-green sunbird with a long, down-curved bill. Can show yellow tufts on the shoulders, though these are usually hidden. Found in forest and adjacent gardens and lush scrub. Usually in the understory. Less social than other sunbirds, and often seen alone. Most distinctive vocalization is a pretty, up-and-down series of clear notes. Mouse-colored Sunbird is similar, but Olive Sunbird is more olive-green than gray.
Thick-billed Green-Pigeon
Treron curvirostra
Brightly-colored and thickset pigeon of the forest canopy, usually seen flying over in pairs or small groups. Distinctive bicolored bill and bright green eyering are visible even from a distance. Both sexes are mostly green. Males have maroon backs, while females are green all over; both have jagged bright yellow striping on the wing edges. Flocks are seen in fruiting trees in lowland and foothill forests, where they often associate with other green pigeons. Gives smoothly undulating “woooOOOO”, often in series.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。