Pacific Screech-Owl
Megascops cooperi
Medium-sized owl with short ear tufts and yellow eyes. Plumage much like other screech-owls, but relatively pale and grayish overall. Fairly common in scrubby woodland and thorn forest along the edge of the Pacific Slope lowlands. Usually detected by its gruff, bouncing-ball song. No other screech-owls occur within its range and habitat.
识别特征
The Pacific screech owl is a medium-sized member of Megascops and has prominent "ear" tufts and bright yellow eyes. The nominate subspecies is 23 to 26 cm (9.1 to 10.2 in) long and weighs 145 to 175 g (5.1 to 6.2 oz). Its facial disc is pale gray with a white and blackish border. Its crown and upperparts are a pale tawny gray with dusky and black vermiculation. Its closed wing shows two pale lines. It has paler off-white underparts with a darker herringbone pattern. M. c. lambi is 20 to 22 cm (7.9 to 8.7 in) long and weighs 115 to 130 g (4.1 to 4.6 oz). It is colored like the nominate with the addition of dark bars and streaks on the crown.
分类信息
- 学名
- Megascops cooperi
- 命名信息
- (Ridgway, 1878)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Megascops
分布与栖息地
The more northern subspecies of Pacific screech owl, M. c. lambi, is found only on the Pacific slope of Oaxaca, Mexico. The nominate subspecies is found from eastern Oaxaca and Chiapas, Mexico, south along the Pacific slope through Guatemala, Honduras, El Salvador, and Nicaragua into northwestern Costa Rica. In the southern part of its range it can also be found on the upper Caribbean slope.<p>The Pacific screech owl inhabits a wide variety of vegetation communities. They include swamp forest and mangroves, arid and semi-arid woodland and scrub, open country with scattered trees and cacti, and secondary forest. In elevation it ranges from sea level as high as 1,000 m (3,300 ft) in Oaxaca and 1,300 m (4,300 ft) in Costa Rica but is usually found much lower.
- 迁徙
- Resident species
行为
The Pacific screech owl is nocturnal and crepuscular. It hunts in clearings and the edges of woodland from a low perch and captures prey by pouncing or sallying. Its diet is mostly large insects but also includes other arthropods such as scorpions and small vertebrates like birds and flying squirrels.<p>The Pacific screech owl's breeding phenology is not well known. It is thought to breed in the dry season. The clutch of three or four eggs is laid in a tree cavity, often an old woodpecker hole.<p>The primary songs of the two Pacific screech owl subspecies differ. That of the nominate has been described as "prrr pu-pu-PU-PU-PU-pu-pu" and that of M. c. lambi a "staccato croarrr-gogogogogogok". Both have secondary songs as well.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Slender-billed Kite
Helicolestes hamatus
Medium-sized, dark raptor with distinctive shape. Adult plumage is entirely slate gray with red legs; immature similar but shows some pale barring on underparts and tail. Note contrasting yellow eye and exceptionally long, decurved bill; in flight, shows very short tail, broad wings, and lack of any white in plumage. Inhabits swampy forests, where it perches quietly at lower and middle levels, preying on snails. Soars frequently but seldom high or for very long (note distinctive flight profile). Call is an explosive single note, falling in pitch and with complaining quality, much like call of Roadside Hawk but more nasal. Most similar to Snail Kite but has yellow (not red) eye, shorter tail with no white, and is generally found in and over closed-canopy forest habitats that Snail Kite avoids.
Spotted Honeyeater
Xanthotis polygrammus
A medium-sized, unique-looking honeyeater of foothill and lower montane forest canopy, and also southern New Guinea savanna. Brown back with small white spots, white underparts with large dark flecks on the belly and dark streaks on the chest. White throat and large area of bare pink facial skin around the eye, wider at the back and a yellow ear patch. Patterning of the underparts and the pink eye-ring distinguish it from other species. Gives a musical repeated, upslurred “wudee”.
Chestnut-headed Partridge
Arborophila cambodiana
Shy and secretive small gamebird restricted to the Cardamom range of Cambodia and far eastern Thailand. Richly patterned, with a bright orange breast, black-and-white scaled sides, and black-barred brown upperparts. Cambodian birds also have a bright orange head and neck. Forages in pairs on the forest floor, duetting loudly to one another in the morning and early afternoon, giving loud ascending couplets followed by a series of chipping notes from one of the pair.
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