Medium Tree-Finch
Camarhynchus pauper
A critically endangered Galápagos finch found only on the island of Floreana. Bill is moderately curved on both upper and lower edges, and slightly longer than it is deep. Male has a black hood, brownish-olive upperparts, and a pale belly. Female is tan with whitish underparts. Both sexes have faint streaking on the breast. Bill is black on breeding male and orange on female and non-breeding male. Large Tree-Finch has larger and more bulbous bill. Small Tree-Finch has slightly smaller bill and body. Identification is much easier when more than one species is present to allow direct comparison. Medium Tree-Finch inhabits forest mainly in the highlands but is occasionally seen closer to the coast, where it may be only a seasonal visitor.
分类信息
- 学名
- Camarhynchus pauper
- 命名信息
- Ridgway, 1890
- 目
- Passeriformes
- 科
- Thraupidae
- 属
- Camarhynchus
分布与栖息地
This species is only found on Floreana Island at elevations above 250 meters in moist highland forest habitats. Prime breeding habitat is dominated by Scalesia pedunculata trees.
- 迁徙
- Resident species
行为
The diurnal Galapagos short-eared owl is its only remaining natural predator. Medium tree finches generally lay two to three eggs. Eggs are incubated for approximately 12 days, and nestlings are fed by both parents at the nest for approximately 14 days before becoming fledglings.<p>The range of beak sizes of the medium tree finch on Floreana and the large tree finch, Camarhynchus psittacula, on Isabela is roughly the same.[citation needed] This reflects the fact that the two species feed on the same type and size of insect. The beak of the medium tree finch is intermediate in size between the small tree finch and large tree finch. All three species are found in the same habitat country and area.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Vietnamese Cutia
Cutia legalleni
A bulky, heavyset bird with a murderous-looking hooked bill. Very similar in appearance to Himalayan Cutia, but ranges do not overlap. Male has blue-gray crown and wing patch, midnight-black mask, orange back and rump, and black-barred white underparts. Female of southern population is much duller, with a dark brown head and streaked brown back. (Northern female has not yet been described.) Inhabits both broadleaved and coniferous hill forest. Moves sluggishly, often in mixed flocks. Song is loud and repetitive, consisting of somewhat twangy whistles and more fluid, warbled notes.
Rusty-throated Parrotbill
Suthora przewalskii
A distinctive mid-sized parrotbill with a highly restricted range; limited to a small part of central China where it inhabits mid- to high-altitude montane scrub and open forests with dense low cover, particularly bamboo stands. Dull brown with a gray head, long black eyebrow, and a dark rusty-red face and throat. Moves in small flocks and vocalizes frequently, giving jumbled high-pitched squeaks and rattly trills.
Fraser's Eagle-Owl
Ketupa poensis
Medium-sized rufous-brown owl, with long ear tufts. Note the dark eyes, rufous face, and cleanly barred underparts. Found in and around humid forest. The main vocalization is a long, haunting whistle that first rises, then falls and fades. Secondary vocalization is a low, rapid, pulsating series of hoots. Similar in shape to Akun Eagle-Owl, but has dark rather than yellow eyes, more rufous coloration, and cleaner markings on the underparts. Also similar to Spotted Eagle-Owl, but much more richly colored, with darker eyes.
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