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
Passeriformes
Thraupidae
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

Luzon Island-Thrush

Luzon Island-Thrush

Turdus thomassoni

Dark thrush of montane forests above 1000 meters, endemic to the Philippine island of Luzon. Not strikingly patterned; black with a dark brown head. Also note bright orange bill, eyering, legs, and feet. Forages at all levels of forest, picking fruit from the canopy and flipping leaves for insects on the forest floor. Song is repetitive but lovely, consisting of warbles and trills. Gives low chup notes and explosive rattling series, especially when alarmed.

Glossy Antshrike

Glossy Antshrike

Sakesphorus luctuosus

A large antshrike with a spiky crest, an often partially concealed white wingbar, and a white-tipped tail. Males are entirely glossy black while females have a chestnut crest. Inhabits the understory of seasonally and permanently flooded forest with vine tangles and dense thickets, where its far-carrying song, an accelerating series of “tah” notes, rings out. Normally forages in pairs and occasionally accompanies mixed-species flocks.

Olive Manakin

Olive Manakin

Xenopipo uniformis

An inconspicuous, small, green bird of the tepui highlands. Key marks are entirely olive-green plumage and yellowish eyering. Inhabits humid, mossy forest undergrowth on tepui slopes, most commonly above 800 m but occasionally lower. Generally solitary, quiet, and easily overlooked; most likely to be seen feeding at fruiting shrubs. Calls include a high, wheezing note that may rise and fall in pitch. Distinctive eyering should easily separate this species from other manakins at higher elevations in the tepuis. Below 800 m, told from Olivaceous Schiffornis by smaller size, shorter tail, and strongly olive-green plumage. Told from female Black Manakin by eyering and olive plumage.

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