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.
Identification
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.
Taxonomy
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.
- Scientific name
- Anarhynchus mongolus
- Authority
- (Pallas, 1776)
- Order
- Charadriiformes
- Family
- Charadriidae
- Genus
- Anarhynchus
Range and habitat
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.
- Breeding range
- PAL : e Russia (s, se Siberia)
- Non-breeding range
- coastal Kyushu and Ryukyu Is. (=Nansei Shoto; s Japan), coastal Taiwan and Vietnam to Australia, New Guinea region, Melanesia and w Micronesia
- Migration
- Complete migrants
Behavior
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.
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
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