Siberian Sand-Plover
Anarhynchus mongolus
Medium-sized plover with a pale throat, brown back, and white belly. Breeding adults have a black mask, white forehead, and a bright orange chest and neck; males average brighter than females. Non-breeding and immature birds are brownish above and white below, with a variable white forehead and eyebrow. Compare with slightly larger Greater Sand-Plover; Siberian is proportionally smaller-headed and darker-legged, and its shorter bill has a slight bulge at the tip. Smaller Kentish Plover can be similar in non-breeding plumage; Siberian is taller and longer-legged, without Kentish’s strong white neck band. Very difficult to distinguish from Tibetan Sand-Plover, especially nonbreeding and immature birds, though identification can often be presumed by range. In breeding plumage, note the less extensive black mask of Siberian, usually with a white spot on the forehead. In nonbreeding plumage, look for a generally stronger breast band and faint brown markings on the flanks in Siberian. In areas of overlap many birds best left unidentified. Breeds mainly in Russian Far East; winters on coastal mudflats and beaches from Taiwan to Australia.
识别特征
This chunky plover is long-legged and long-billed. Breeding males have grey backs and white underparts. The breast, forehead and nape are chestnut, and there is a black eye mask. The female is duller, and winter and juvenile birds lack the chestnut, apart from a hint of rufous on the head. Legs are dark and the bill black.<p>In all plumages, this species is very similar to the greater sand plover, Charadrius leschenaultii. Separating the species may be straightforward in mixed wintering flocks on an Indian beach, where the difference in size and structure is obvious; it is more difficult to identify a lone vagrant to western Europe, where both species are very rare. The problem is compounded in that the Middle Eastern race of greater sand plover is the most similar to the lesser. The lesser usually has darker legs, a white forehead, and a more even white wing bar than the greater.
分类信息
The Siberian sand plover and the Tibetan sand plover were previously considered to belong to the same species known as the "lesser sand plover", consisting of five races within the species complex. However, a study published in 2022 suggested that the "mongolus" group (currently identified as the Siberian sand plover) within the lesser sand plover is actually the sister group of the greater sand plover. Additionally, the "atrifrons" group (representing the Tibetan sand plover) is the sister group of the monophyletic group formed by the "mongolus" group and the greater sand plover.<p>This means that the lesser sand plover is paraphyletic. Therefore a taxonomic revision was needed. The authors suggested new scientific and common English names for them. The large East Asian forms mongolus and stegmanni are currently identified as the Siberian sand plover, Anarhynchus mongolus; and the Tibetan Plateau form is now known as the Tibetan sand plover, Anarhynchus atrifrons, which includes the three races atrifrons, pamirensis and schaeferi.<p>IOU accepted the split and renaming of the lesser sand plover in 2023.
- 学名
- Anarhynchus mongolus
- 命名信息
- (Pallas, 1776)
- 目
- Charadriiformes
- 科
- Charadriidae
- 属
- Anarhynchus
分布与栖息地
It breeds discontinuously across bare coastal plains in north-eastern Siberia, with the Mongolian plover in the eastern part of the range; it has also bred in Alaska. It nests in a bare ground scrape, laying three eggs. This species is strongly migratory, wintering on sandy beaches in east and southeast Asia.
- 繁殖区
- PAL : e Russia (s, se Siberia)
- 非繁殖区
- coastal Kyushu and Ryukyu Is. (=Nansei Shoto; s Japan), coastal Taiwan and Vietnam to Australia, New Guinea region, Melanesia and w Micronesia
- 迁徙
- Complete migrants
行为
The Siberian sand plover feeds on insects, crustaceans and annelid worms, which are obtained by a run-and-pause technique, rather than the steady probing of some other wader groups. This species takes fewer steps and shorter pauses than the greater sand plover when feeding.<p>The flight call is a hard trill.<p>The Siberian sand plover is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Vesper Sparrow
Pooecetes gramineus
Large, drab, streaky sparrow of grasslands, second growth, and bare ground. Most distinctive in flight, when it flashes white outer tail feathers. Also note the thin white eyering and rufous shoulder (often hidden). Forages mainly on the ground. Song usually starts with a couple clear introductory notes, followed by a series of trills and chips.
Pacific Elaenia
Myiopagis subplacens
A plain flycatcher restricted to dry and semi-humid forest in western Ecuador and northwestern Peru. It is best identified by the pale eyebrow and the dark, smudgy stripe that starts behind the eye and curls down behind the ear. Also note the lack of distinct wingbars and voice. Most common call is a burry phrase that can be roughly transcribed as “Hit it! You’re it.”
Gray-lored Broadbill
Serilophus rubropygius
A small, quiet bird with a distinctly silky, smooth-feathered appearance. Shape and pattern unique and unmistakable; note thick black stripe behind eye, dark wings with a glossy blue-and-black panel, and broad-based silvery bill. Usually moves around through the middle layers of foothill and montane forest. Does not often join mixed-species foraging flocks, instead tending to stick to medium-sized groups of its own species. Sometimes gives a smooth, fluid ‘teelee!’Formerly treated as a subspecies of Silver-breasted Broadbill.
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