Saipan Reed Warbler
Acrocephalus hiwae
A relatively large plain brown reed warbler with a pale throat, a yellowish face, a darker cap and tail, and an absurdly long decurved bill. Found in areas of tall dense grasses, reed marshes, and scrubby thickets up to 400 meters of elevation. Song is a slow, loud reel of whistles, warbles, harsh “chak” notes, and trills. Call is a loud, offensive “tchak.” Often sings at night.
识别特征
The Saipan reed warbler is approximately 17 cm (6.7 in) long, and is greyish olive-brown above with a pale-yellow underside. The female is slightly smaller than the male. Both sexes have a long bill compared to other reed warbler species.
分类信息
It is sometimes considered a subspecies of the extinct nightingale reed warbler (A. luscinius) by some taxonomists.
- 学名
- Acrocephalus hiwae
- 命名信息
- (Yamashina, 1942)
- 目
- Passeriformes
- 科
- Acrocephalidae
- 属
- Acrocephalus
分布与栖息地
It occurs on two islands: Saipan and Alamagan. An estimated population of 2700 birds was reported in 2009 on Saipan, and on Alamagan 950 birds were reported in 2010. It inhabits wetlands, thickets and the margins of forests.
- 迁徙
- Resident species
保护状况
Threats to the survival of the Saipan reed warbler include habitat destruction resulting from urban development and agriculture, the introduction of invasive species, and volcanic eruptions.
- 种群趋势
- declining
照片
分布
其他鸟类
Broad-billed Warbler
Tickellia hodgsoni
Greenish-backed, yellow-bellied, gray-headed, and rufous-crowned, this colorful small warbler closely resembles a Mountain Tailorbird; look for a significantly shorter bill and more extensive rufous on the crown. Forages actively and sometimes socially in thick, dense undergrowth in mid- to upper-elevation forests, often in stands of bamboo. Song consists of high thin “tseeeee” and “tsi-leeeeee” notes, as well as a lower-pitched rollicking sputter.
Scarlet-rumped Tanager
Ramphocelus passerinii
Fairly common in humid tropical lowlands. Favors evergreen forest edges, plantations, and verdant second growth, such as areas along roadsides. Forages mainly at low to middle levels often in fairly noisy small groups. Male is unmistakable if seen clearly: velvety black with a blinding scarlet rump. Female is very different: note distinctive bluish-white bill, tawny rump, and grayish head. Formerly known as Cherrie's Tanager and Passerini's Tanager.
Chabert Vanga
Leptopterus chabert
Small, black-and-white finch-like vanga. Shows a white patch at the base of the tail in the southwest, and an all-black tail elsewhere. Madagascar endemic that is found in all forest types, and sometimes in plantations and scrub. Constantly on the move, usually in small flocks. Frequently gives a dry “cha-bert” call. Smaller than White-headed Vanga, with a black cap. Also smaller than Blue Vanga, with a black rather than blue back.
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