Green Warbler-Finch
Certhidea olivacea
Small, slender-billed Galápagos finch. Best identified by its thin bill, brownish-gray plumage, and the island on which it is seen. Male sometimes has a faint, orange wash on throat and face. Inhabits the central and western islands of Santa Cruz, Baltra, Santiago, Rábida, Pinzón, Isabela, and Fernandina. Not found together with the very similar Gray Warbler-Finch. Might be mistaken for a young female Yellow Warbler (some of which show only a trace of yellow), but note more finch-like bill and shorter tail. Lives in a variety of wooded habitats, but most common in humid highland forest.
识别特征
The green warbler-finch (Certhidea olivacea) is a species of bird, one of Darwin's finches (which are mainly found in the Galápagos Islands) in the tanager family Thraupidae. Sometimes classified in the family Emberizidae, more recent studies have shown it to belong in the tanager family. When Darwin collected it in 1835 during the Beagle survey expedition he mistakenly thought it was a wren, but on return to England he was informed in March 1837 by the ornithologist John Gould that the bird was in the group of finches. It is endemic to the Galápagos Islands, Ecuador. This species is closely related to the grey warbler-finch, and the two were formerly considered conspecific, but both species differ in appearance, distribution, habitat, and song. Holding a distinctive place in the evolutionary history of Galápagos finches, phylogenetic studies suggest that the warbler-finches represent one of the earliest branches in the radiation of Galápagos finches, diverging prior to the more well-known ground finches and tree finches. With its slender, pointed beak adapted for capturing insects, the green warbler-finch occupies a unique ecological niche within the Galápagos archipelago. As such, the green warbler-finch serves as a crucial species for understanding the evolutionary processes that have shaped the remarkable avian diversity found in this iconic ecosystem.
分类信息
Genus: Certhidea; Family: Thraupidae; Order: Passeriformes.
- 学名
- Certhidea olivacea
- 命名信息
- Gould, 1837
- 目
- Passeriformes
- 科
- Thraupidae
- 属
- Certhidea
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Ocellated Poorwill
Nyctiphrynus ocellatus
Dark brown nightjar of humid forests. Smooth reddish brown overall with small black spots, a clean white throat band, and white tail corners. In flight, appears dark brown overall with white tail corners but no white wing patches. Look for it in mature rainforest, with or without dense understory. Song is a single quavering, reverberating note, “PEEur,” like plucking a taut string.
Black Drongo
Dicrurus macrocercus
An adaptable songbird of open areas such as farmland, forest edge, meadows, wetlands, and fields and a common sight as a familiar dark silhouette perched on wires, fences, or snags. Black plumage flashes blue and green iridescence in favorable light, though much less so than in Hair-crested or Bronzed Drongo. A pugnacious species, frequently chasing away larger birds with repeated dives and harsh chattering calls. A skilled mimic of other species, and a strong songster in general, delivering a wide range of pleasant fluty calls, harsh chattering, nasal notes, and high sharp whistles.
Rufous-tailed Babbler
Moupinia poecilotis
Dull brown with a pale throat, rufous-tipped wings, and a long tail. Somewhat resembles a more upright, shorter-billed bush warbler. Duller and less contrastingly-marked than most other babblers in its range. Forages in tangled, scrubby areas at middle and high altitudes, where it can often be difficult to see.
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