Altamira Yellowthroat
Geothlypis flavovelata
Brightly plumaged yellowthroat, restricted to northeast Mexico. Favors reed beds and adjacent marshy vegetation around lakes and ponds, also locally in cane fields. Common Yellowthroat is a common migrant throughout range of Altamira and is usually more numerous. Altamira is brighter yellow overall than Common. Male has yellowish border to black mask and extensively yellow underparts. Female is brighter and more extensively yellow on face and underparts than Common, but can be difficult to distinguish.
识别特征
The Altamira yellowthroat is 13 cm (5.1 in) long and has a yellow-green back and bright yellow belly. The adult male has a black face mask and yellow crown. Females are similar, but lack the black mask and have an olive crown. This species is easily distinguished from wintering common yellowthroats by its uniform yellow underparts, in contrast to common's white belly. Males' yellow forehead bands are diagnostic.<p>Vocalizations are very similar to those of common yellowthroat and are not readily distinguishable to the human ear. Altamira and common yellowthroats, however, do not respond to tapes of one another's songs.
分类信息
It is closely related to common yellowthroat, Belding's yellowthroat, and Bahama yellowthroat, with which it forms a superspecies. It has been considered conspecific with these species.
- 学名
- Geothlypis flavovelata
- 命名信息
- Ridgway, 1896
- 目
- Passeriformes
- 科
- Parulidae
- 属
- Geothlypis
分布与栖息地
- 迁徙
- Resident species
行为
The species is resident in freshwater marshes (including canals and drainage ditches), especially those with cattails. Little is known of its breeding or feeding habits, but other yellowthroats build a cup nest low in vegetation and feed on insects, usually captured in dense vegetation, so it is likely that the Altamira yellowthroat does the same.
保护状况
There has been a decline in numbers of this localized bird due to loss of habitat.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Green Oriole
Oriolus flavocinctus
Medium-sized songbird with a long red bill and red eye. Olive-green above, with greenish breast blending into yellow belly. Juvenile and immature also yellowish on the belly, unlike Olive-backed Oriole or Australasian Figbird. Forages in forested areas, gardens, and parks in northern Australia, usually singly or in pairs, singing frequently, a rich, throaty “yok-yok-yoddle.”
New Caledonian Grassbird
Cincloramphus mariae
Extremely shy, smallish, long-tailed brown songbird, found locally throughout New Caledonia. When seen, note warm brown upperparts and flanks contrasting strongly with a white eyebrow, throat, and belly. Prefers scrubby habitats, and most common where there’s a mix of short bushes, dense ferns, and some grass. Best found through its distinctive call note, a dry doubled “ch-tk!”.
Crested Drongo
Dicrurus forficatus
Bold black fork-tailed bird with a towering crest. Juveniles have some pale fringes and a reduced crest, but still show the forked tail. Found in all types of forest at low and middle elevations, and less commonly in scrub, in villages, in plantations, and at high elevation. Perches prominently in the open, swooping out to catch insects on the wing. Often joins mixed feeding flocks with other birds. Fearless bird that doesn’t hesitate to mob mammalian predators or raptors. Song is a repeated sequence of whistles, creaks, and rasps. Forked tail and crest make it unmistakable within its range.
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