Mekong Wagtail

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Mekong Wagtail
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Motacillidae
Genus: Motacilla
Species: M. samveasnae
Binomial name
Motacilla samveasnae
Duckworth, Alström, Davidson, Evans, Poole, Setha & Timmins, 2001

The Mekong Wagtail (Motacilla samveasnae) is a species of bird in the Motacillidae family. It is named in honour of the late Cambodian ornithologist Sam Veasna.

Description

The Mekong Wagtail most closely resembles African Pied Wagtail M. aguimp, although two species ranges are far apart. It differs from M. agiump in several minor respects, particularly wing pattern, and its vocalisations are very distinctive. It is a very distsinctive species and is the only black-and-white wagtail in South-East Asia which exhibits the plumage character combination of black forehead, lores and ear coverts, obvious white supercilia, with white a throat and neck patch.[2]

Distribution

The Mekong River breeding in Cambodia and Laos, but apparently it is a non breeding visitor to Thailand.[3] It also occurs in Vietnam.[4]

Habitat

The Mekong Wagtail is found in wide lowland river channels. Terrotorial birds are associated with fast-flowing braided sections of river which flow through a distinctive landscape of rocks, bushes adapted to prolonged seasonal submersion, mainly Homonoia riparia, with sandbars and gravel shoals. As river levels rise during the May/June–October/November rainy season these features become flooded. The species concentrates along earthen banks and associated overhanging vegetation, and patches of exposed sand and silt, where they occur in pairs, some of which are highly territorial, and small flocks of less than a dozen birds.[2]

Threats

The Mekong wagtail is very tolerant of human presence, and its habitat is not very susceptible to human-induced changes. Damming proposals along the Mekong, in particular those on sections where the river has a low gradient, have the potential to destroy significant stretches of its riverine range by inundating the river channel[3]

Taxonomy

The species was overlooked until 2001 when it was described. It is most similar in appearance to the African Pied Wagtail but genetic evidence suggests that the two are not more closely related to each other compared to other black and white wagtails such as the White Wagtail M. alba complex or the White-browed Wagtail M. maderaspatensis.[2]

References

External links


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