Thai National Parks

Species of Thailand

Dark-sided thrush

Zoothera marginata

Edward Blyth, 1847

In Thai: นกเดินดงเล็กปากยาว

The dark-sided thrush (Zoothera marginata) is a species of bird in the thrush family Turdidae. It is also known as the lesser brown thrush, the long-billed ground-thrush, and the dark-sided ground-thrush. The species is monotypic (lacking subspecies) and is closely related to a number of thrushes in the genus Zoothera, including the long-billed thrush and the widespread scaly thrush. It was described by Edward Blyth in 1847 based upon a specimen collected in Rakhine in Burma (Myanmar).


The dark-sided thrush is 24 to(-) 25 cm in length and weighs around 80 g. It has a particularly long blackish bill and the plumage is a contrasting dark brown head with rufous-brown wings. The face has a white loral stripe and a white eyering with a whitish throat and chin. The call is a series of monotone thin whistles.

Distribution and habitat

The species has a discontinuous distribution in the eastern Himalayas, and then a population in the higher areas of Burma, northern Thailand, Laos, Vietnam and the extreme south of China. The species is generally non-migratory but will move down from higher altitudes in winter, and has turned up as a vagrant in Bangladesh. It ranges from 750 to(-) 2100 m in broadleaf forests, particularly in damp areas and around rocky streams, also in areas of reed and bamboo in these forests. The species is not common anywhere, but is potentially often overlooked due to its cryptic plumage and retiring behaviour.

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Category / Seasonal Status

BCST Category: Recorded in an apparently wild state within the last 50 years

BCST Seasonal status: Resident or presumed resident

Scientific classification

Zoothera marginata

Common names

  • Thai: นกเดินดงเล็กปากยาว

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Dark-sided thrush

Range Map

Distribution map of Dark-sided thrush, Zoothera marginata in Thailand
  • Chiang Dao Wildlife Sanctuary
  • Doi Inthanon National Park
  • Doi Pha Hom Pok National Park
  • Doi Phu Kha National Park
  • Khao Soi Dao Wildlife Sanctuary
  • Mae Wong National Park
  • Nam Nao National Park
  • Phu Suan Sai National Park
  • Tat Mok National Park
Range map of Zoothera marginata in Thailand