Broad-tailed Hummingbird
Selasphorus platycercus
Common hummingbird of high elevations. Breeds in open woodland with meadows and scrub. In winter, found at lower elevations. Male is distinctive in range with beautiful rosy-red throat and glistening green upperparts. Female is duller with buffy sides and speckled throat. Note broadly rounded tail feathers with restricted rufous. Feeds on nectar and small insects. Visits feeders.
识别特征
Medium in size, the broad-tailed hummingbird is 4 inches (10 cm) in length and possesses an overall wingspan of 5.25 inches (13.3 cm). Weighing around 3.6 grams (0.13 oz), the female tends to be slightly larger than the male. Adults of both sexes show an iridescent green back, white eye ring and a rounded black tail projecting beyond their wing tips, from which their name was inspired. <p>This species shows sexual dimorphism, which means that male and female have different characteristics. The male possesses a characteristic bright rose-red gorget. An identification characteristic is the white eye ring. The female can be distinguished from the male by her paler coloration, cinnamon flanks, and spotted cheeks absent in the male.<p>The broad-tailed hummingbird produces several different sound patterns. This bird's call sounds like a sharp “cheet”, which is repeated “cheet cheet cheet cheet...”. Hummingbird wing beats have also been found to be a communication signal. These birds produce two different types of sound using their wing beat. The first one is a “wing hum” and is simply produced when the hummingbird flies. This type of wing beat has a sound that ranges from 35 to 100 Hz, and both sexes are able to produce it for communication. The second is “wing trills” produced by the male hummingbird during courtship displays. The wing trill produces a buzzing sound and can be heard 50 m away by other males and 75 m away by other females. This sound is produced when air passes rapidly through the 9th and 10th primary feathers. In one experiment, birds without this wing trill lost their territory more easily to more aggressive birds.
分类信息
The broad-tailed hummingbird, Selasphorus platycercus, is a member of the order Apodiformes, in the family Trochilidae. Hummingbird taxonomy has not been extensively studied, but its phylogenic division can be divided as a family into nine clades in which the broad-tailed hummingbird is a member of the "Bee group" and included in the Selasphorus genus. This genus is composed of 6 members taxonomically distinguished based on color characteristics. This genus is characterized by hummingbirds with a plumage containing rufous coloration and a neck gorget of orange to purple in males.<p>Members of this genus include:<p>Selasphorus sasin : Allen's hummingbird<p>Selasphorus rufus : Rufous hummingbird<p>Selasphorus scintilla : Scintillant hummingbird<p>Selasphorus ardens : Glow-throated hummingbird<p>Selasphorus flammula :Volcano hummingbird<p>On a geographic scale, the genus Selasphorus can be subdivided into 2 groups of species, one living in North America, and a second in the region of Costa Rica and Panama.
- 学名
- Selasphorus platycercus
- 命名信息
- (Swainson, 1827)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Selasphorus
分布与栖息地
The broad-tailed hummingbird is found from Guatemala to Mexico, and western United States and Western Canada during summer, while wintering regions are mainly in southern Mexico and Guatemala.<p>This species exhibits partial migration, depending on the northern range during winter. The specific migratory route used by the broad-tailed hummingbird remains unknown, although migrating populations winter in southern Mexico or Guatemala and return to their breeding area in spring. Males arrive first to the breeding range, followed by breeding females. Some populations of the broad-tailed hummingbird in southern Mexico and Guatemala do not migrate, a variation in behavior called "sedentary". This hummingbird is seen in the understory or under tree canopies of pine and oak woodland. It forages in open areas with flowers or in grasslands among trees and shrubs. Its breeding habitat is mainly in subalpine meadows, foothills, montane valleys, and stands of aspen or spruce.
- 繁殖区
- NA : wc USA, Mexico and w Guatemala
- 非繁殖区
- MA
- 迁徙
- Complete migrants
保护状况
This species conservation status is “Least Concern ”, indicating it is not an endangered species, having a wide range and moderate population size, although one survey indicated a 52% decline in population between 1966 and 2015. It appears to be adapted to human-modified habitats.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Scaly Babbler
Turdoides squamulata
A very dark babbler with pale scaling on the crown, throat, and breast and a yellow-orange eye. In the southern part of the range has a blackish ear patch, while in the north, can show a brown ear patch and a white chin, or else a completely white face. Found locally in coastal scrub, riparian thickets, and woodland with thick undergrowth. Almost always in small groups, which feed by hopping across the ground. More elusive and skulking than most babblers. Northern subspecies can be similar to White-rumped Babbler, but easily separated by the lack of a white rump. Usually located by the raspy babbling call, usually given by a whole group in chorus.
Cryptic Becard
Pachyramphus salvini
Small becard occurring from southwest Colombia to northwest Peru, mainly on the west slope of the Andes and in the Marañon drainage, but (perhaps seasonally?) on the east slope of the Andes as well. Mostly found in foothills, in middle to upper levels of humid montane forest, dry forest, and more open second-growth. Male is mostly gray with bold white edges on the wing feathers and a black cap with pale spectacles. Compare with White-winged Becard, which has a black back and dark lores. Female is very different; look for her brown cap bordered with black, white spectacles, pale yellowish belly, and tawny edges on wing feathers. Extremely similar to Black-and-white Becard, with potential range overlap on the east slope of the Andes in Ecuador and Peru. Male Cryptic shows a narrower upper wingbar, paler lores, a grayer upperside of the tail, and a more slender bill than Black-and-white. Female Cryptic has a duller brownish crown with a narrower black border. These features may all be difficult or impossible to assess in the field; some birds are best left unidentified. Also note voice: song a fast series of two sweet downslurred whistles followed by a stuttered upslurred whistle, often repeated two or three times. Black-and-white’s song is slower, with longer notes.
Yellow-billed Lorikeet
Neopsittacus musschenbroekii
A medium-sized, long-tailed parrot of mid-montane forest and edge. Predominantly green with a bright red patch from the chest, where it is broadest, to the belly. Yellow bill and lime green streaks radiating from the eye. Readily seen flying in small flocks. Similar to Orange-billed Lorikeet, but Yellow-billed Lorikeet is usually found at lower elevations, is slightly larger with an obviously yellow bill and reddish undertail. Call, a shrill, high-pitch “siiik!”.
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