Choco Screech-Owl
Megascops centralis
Small, cryptically patterned, yellow-eyed owl of tropical lowland forest from Panama to Ecuador. Tends to stay well hidden in the understory. 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 Chocó screech owl is 20.5 to 27 cm (8.1 to 10.6 in) long; two specimens weighed 106.7 and 121.5 g (3.76 and 4.29 oz). It has gray and rufous color morphs and many individuals' plumages are intermediate between the extremes. The gray morph has a grayish white facial disc with blackish bars and a faint black edge, indistinct whitish brows above yellow to red-orange eyes, and short but distinct "ear" tufts. The upperparts are brownish gray mottled with black and buff. The folded wing shows irregular white spots along the margin. Its chin is white and the rest of the underparts white to buffy white with narrow black bars and buffy to gray mottling. The rufous morph is rufous brown above with much less mottling than the gray morph and the undersides are shades of brown.
分类信息
The Chocó 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 centralis.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 Chocó screech owl is monotypic.
- 学名
- Megascops centralis
- 命名信息
- (Hekstra, 1982)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Megascops
分布与栖息地
The Chocó screech owl is found from central Panama into northwestern Colombia and in a narrow band of western Ecuador. It inhabits the interior and borders of humid primary and secondary forest in lowlands and foothills. In elevation it ranges as high as 1,575 m (5,167 ft) in southwestern Ecuador but is usually found below 1,000 m (3,300 ft).
行为
The Chocó screech owl is usually found in the forest mid-story, but its foraging behavior has not been documented. Its diet is assumed to be large invertebrates and small vertebrates like that of other Megascops screech owls.<p>The Chocó screech owl's breeding season appears to be January to March, based on the one nest that has been found and the collection of a female with a partially formed egg. The nest was in a natural cavity in the trunk of a dead tree. The bottom of the cavity contained bark, wood dust, dry leaves, pellets, remains of prey, and eggshell fragments.<p>The Chocó screech owl appears to have only one song, in contrast to most other screech owls that have primary (territorial) and secondary (courtship) songs. It is described as "short...trill with a rapid pace" that starts on an even pitch and then drops. The volume varies throughout.
照片
分布
鸟叫声
其他鸟类
Yungas Guan
Penelope bridgesi
Large guan with a long tail and red throat wattle. Dark brown overall with extensive white markings on wings. Unlike most other members of its genus, Yungas has dull grayish legs. Found in montane forests and edges. Listen for loud, harsh calls often given in a series. Restricted range in northwestern Argentina and southern Bolivia. Usually in pairs or small groups; often seen feeding at fruiting trees, but can be seen walking on the ground.
Purple-crested Turaco
Gallirex porphyreolophus
A bulky, iridescent bird clad in deep purple, blue, green, and olive washed with pink. It clambers acrobatically through riverine woodland and savanna thickets. In flight it explodes from the canopy with distinctive deep red panels in the wings. It produces a distinctive croaking “khoh-khoh-khoh-khoh….” that gets progressively louder before suddenly stopping. The similar Ross’s Turaco differs from Purple-crested Turaco by being darker overall and having a red crest and yellow face.
Smoky Warbler
Phylloscopus fuligiventer
Dark sooty leaf warbler with a pale brow stripe and no wingbars. Yellow wash to the underparts tends to be absent in worn birds. Extremely similar in appearance to Dusky Warbler, which averages larger and darker overall, and has a longer, brighter brow stripe. Breeds in scrubby areas above the treeline and moves downhill into shrubby and grassy foothill and lowland areas. Forages low on the ground, often around rocks or water. Song is a repetitive series of liquid notes. Calls are dry, hard “chuck” or “tick” notes.
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