Thai National Parks

Species of Thailand

Berdmore's narrow-mouthed frog

Microhyla berdmorei

Edward Blyth, 1856

In Thai: อึ่งแม่หนาว

Microhyla berdmorei (common names: Berdmore's chorus frog, Berdmore's narrow-mouthed frog, Burmese microhylid frog, large pygmy frog, Pegu rice frog) is a species of narrow-mouthed frog found in eastern India, Bangladesh, southernmost China (Yunnan), Mainland Southeast Asia as well as Borneo and Sumatra. Frogs from Bangladesh probably represent an unnamed species.


Male Microhyla berdmorei grow to a snout–vent length of 25 - 28 mm and females to 27 - 45 mm. They have a characteristic yellowish belly. They have relatively long legs and can make impressive jumps. Tadpoles are up to 23 mm in length.


Microhyla berdmorei inhabits various types of moist evergreen forest. It is generally associated with hilly regions and often found near streams. Breeding mainly takes place in still pools. Male frogs form large choruses. It is a common species in suitable habitat (though not in Borneo).

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Scientific classification

Microhyla berdmorei

Common names

  • English:
    • Berdmore's narrow-mouthed frog
    • Berdmore's chorus frog
    • Burmese microhylid frog
    • Large pygmy frog
    • Pegu rice frog
  • Thai: อึ่งแม่หนาว


  • Callula natatrix, Edward Drinker Cope (1867)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Microhyla berdmorei - La-ngu District, Satun Province
Microhyla berdmorei - Krung Ching Waterfall, Khao Luang National Park
Microhyla berdmorei - Krung Ching Waterfall, Khao Luang National Park
Microhyla berdmorei - Phu Kradueng National Park
Microhyla berdmorei - Phu Kradueng National Park
Microhyla berdmorei - Nam Nao National Park
Microhyla berdmorei - Nam Nao National Park

Range Map

Distribution map of Berdmore's narrow-mouthed frog, Microhyla berdmorei in Thailand
  • Huai Kha Khaeng Wildlife Sanctuary
  • Kaeng Krachan National Park
  • Khao Chamao - Khao Wong National Park
  • Khao Luang National Park
  • Khao Nan National Park
  • Khao Phanom Bencha National Park
  • Khao Sok National Park
  • Khao Yai Da
  • Khao Yai National Park
  • Nam Nao National Park
  • Phrom Khiri District, Nakhon Si Thammarat
  • Phu Hin Rong Kla National Park
  • Phu Khiao Wildlife Sanctuary
  • Phu Kradueng National Park
  • Phu Wua Wildlife Sanctuary
  • Sakaerat Environmental Research Station
  • Suan Phueng District, Ratchaburi
  • Thale Ban National Park
Range map of Microhyla berdmorei in Thailand