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)
Passeriformes
Acrocephalidae
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

Stripe-backed Antbird

Stripe-backed Antbird

Myrmorchilus strigilatus

Long-tailed antbird with brown- and black-streaked upperparts. Note the white eyebrow contrasting with the black eye-line. Males have a black throat and upper breast, while females have a whitish throat and light streaks on the breast. Forages mostly on the ground and sometimes in the understory of dry forest and scrub. Song starts with 1-2 whistles and continues with a series of fast descending notes.

Biak Megapode

Biak Megapode

Megapodius geelvinkianus

A small, dark scrubfowl of forest and disturbed habitats on the Bay Islands where the only member of its family. Sooty gray plumage, bare red to gray face, slight crest at the back of the head, reddish legs, and yellowish bill. It scrapes the forest floor with its large feet to uncover invertebrates. More often heard than seen. Vocal, giving varied parrotlike squeals. A common call is 2 tuneless yelps similar to New Guinea Scrubfowl, the first note higher than the second.

Short-tailed Lark

Short-tailed Lark

Spizocorys fremantlii

An unusual and distinctive lark with a large bill and a short tail. Note the black “tear” mark below the eye. Plumage varies geographically; this lark is sandy brown in the northern part of the range and dark brown in the south. Found in dry, short grassland, usually within savanna environments, generally in small flocks. Somewhat similar to Thekla Lark, but has a larger bill and a shorter tail, and lacks a crest. The song includes short series of well-spaced slurred whistles. The typical call is a nasal whistle. 

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