Foothill Screech-Owl
Megascops roraimae
Small, cryptically patterned, yellow-eyed owl of forest in lowlands and foothills, where it tends to stay well hidden in the understory. Occurs on the east slope of the Andes and into the lowlands, as far south as Bolivia and as far east as the Guyanas. Cannot be identified readily by sight, but it is the only screech-owl throughout most of its range and within its habitat. Song is a purring trill that can easily be mistaken for the purring of a toad or insect. Plumage varies from grayish brown overall to reddish.
识别特征
The foothill screech owl is 20 to 23 cm (7.9 to 9.1 in) long and weighs 91 to 128 g (3.2 to 4.5 oz). The subspecies are reddish brown to brown with paler bellies, and most have both a pale and a dark morph. The intensity of the reddish cast varies among the subspecies as do the amount and pattern of streaks and spots on the upperparts and vermiculation on the underparts.
分类信息
The foothill screech owl's taxonomy has undergone numerous changes. It has variously been treated as embedded in or a subspecies of the original Otus guatemalae and then as a subspecies of O. vermiculatus when that was split from O. guatemalae. In the early 2000s all of the New World members of Otus were assigned to Megascops. As of 2019, the International Ornithological Committee (IOC), the North and South American Classification Committees of the American Ornithological Society (AOS), and the Clements taxonomy treat it as a separate species, Megascops roraimae.However, BirdLife International's Handbook of the Birds of the World treats it as being embedded within M. vermiculatus vermiculatus, the nominate subspecies of vermiculated screech owl.<p>The IOC recognizes three subspecies, the nominate Megascops roraimae roraimae, M. r. pallidus, and M. r. napensis. The Clements taxonomy recognizes two more, M. r. helleri and M. r. bolivianus, that the IOC includes within napensis.
- 学名
- Megascops roraimae
- 命名信息
- (Salvin, 1897)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Megascops
分布与栖息地
The subspecies of the foothill screech owl are found thus:<p>The foothill screech owl inhabits dense humid to wet rainforest, though exact details have not been documented. In elevation it mostly ranges between 250 and 1,500 m (820 and 4,920 ft) and rarely up to 1,800 m (5,900 ft).
行为
The foothill screech owl's hunting practices have not been documented. Its diet is mostly insects and other arthropods and perhaps includes small vertebrates.<p>The foothill screech owl's breeding phenology has not been documented. It is assumed to nest in tree cavities, either natural or made by another bird, like others of its genus.<p>The foothill screech owl's song is a "wavering trill" similar to that of the Middle American screech owl (M. guatemalae). It "starts quietly, gradually incrasing in volume and pitch, then dropping slightly in pitch but with steady volume [and] decreases in volume near [the] end."
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分布
鸟叫声
其他鸟类
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Symposiachrus everetti
A striking black-and-white flycatcher-like songbird confined to Tanahjampea Island. Black above, with a black hood and upper chest and a crisp white lower breast, belly, rump, and tips to outer tail feathers. Black areas are brown in juvenile, which has a buff belly and rump. Cocks tail regularly. Found singly or in pairs in forest, mangrove, and scrub in lowlands and foothills. Often joins mixed-species flocks. Unique within its tiny range. Song is a mournful, repeated whistle, “weeoo-weeoo...”. Also gives a rasping, agitated “grrr” and metallic, grating “weer” calls.
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