Buff-fronted Owl
Aegolius harrisii
Strikingly beautiful small owl without ear tufts. Dark chocolate brown above with pale spots contrasting with a creamy-rufous belly. The face is strongly marked with a dark line from the crown down across the eyes. Usually found in open woodlands, forest edge, and second growth without large trees. Voice is a low descending, rolling “prruuuu.”
识别特征
The buff-fronted owl is 19 to 21 cm (7.5 to 8.3 in) long and weighs 104 to 155 g (3.7 to 5.5 oz). It is compact and has a short tail and a large blocky head without ear tufts. Its facial disks are buff with a black surround and distinctive black patches above its greenish yellow eyes. The nominate subspecies' forehead and hindneck are yellowish buff and the rest of the head and upperparts chocolate brown. The tail is blackish and has two white bars and a white tip. Its chin has a small brown patch and the rest of the underparts are yellowish buff. A. h. dabbenei has darker upperparts and a cinnamon tinge on the underparts. A. h. iheringi is also darker above and its underparts are a deeper orange.
分类信息
The buff-fronted owl was described by the American ornithologist John Cassin in 1849, and given the binomial name Nyctale harrisii. The binomial commemorates the American ornithologist Edward Harris.<p>The buff-fronted owl is the only member of genus Aegolius in South America. Its closest relative is the northern saw-whet owl (A. acadicus) of Canada and the U.S., and the other two extant members of the genus are found there and in Mexico. It has three subspecies, the nominate A. h. harrisii, A. h. dabbenei, and A. h. iheringi. The last of these has been suggested to be a separate species.
- 学名
- Aegolius harrisii
- 命名信息
- (Cassin, 1849)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Aegolius
分布与栖息地
The nominate subspecies of the buff-fronted owl is found discontinuously in the Andes from Venezuela south to southern Peru. A. h. iheringi is also found discontinuously, in Bolivia, Paraguay, eastern Brazil, and in southern Brazil, northeastern Argentina, and northeastern Paraguay. A. h. dabbenei is found in northwestern Argentina, and birds observed in western Bolivia might also be this subspecies. The subspecies of birds found locally on the tepuis of southern Venezuela and Guyana is not known.<p>The buff-fronted owl inhabits a variety of landscapes including open humid forest, dry forest, forest edges, subtropical rainforest, and human-altered areas with fruit trees and palms. In the Andes it ranges between 1,500 and 3,800 m (4,900 and 12,500 ft) and elsewhere between about 600 and 1,000 m (2,000 and 3,300 ft).
- 迁徙
- Resident species
行为
The buff-fronted owl's hunting behavior and diet have not been studied. It has been recorded taking insects, rodents, birds, and other small vertebrates.<p>Almost nothing is known about the buff-fronted owl's breeding phenology. A nest with three eggs was found in Brazil in March; it was in a dead palm, in what appeared to be an abandoned parrot nest cavity. Another nest was in a hollow tree.<p>The male buff-fronted owl's song is "a rapid, wavering trill, 'frurururururururu'". Dependent fledglings give a "hissing, raspy 'cheet' begging call".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
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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.
Campo Flicker
Colaptes campestris
Large and typically terrestrial woodpecker. Found in open habitats such as savannas and grasslands and often seen foraging in groups. The body is heavily barred above and below with a dark cap, yellow cheeks, and a yellow collar. Males have a red moustache, blackish in females. The throat is black in the northern subspecies and white in the southern “Field Flicker” subspecies.
Regent Parrot
Polytelis anthopeplus
Large, long-tailed, distinctive parrot of open inland areas with scattered woodlands, where it breeds in hollows of large trees. When perched, note greenish-yellow body, black wing with red and yellow patches, and red bill. In flight, black flight feathers and tail contrast strongly with yellow wing coverts and rump. Calls include a loud, squeaky chatter.
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