Thai National Parks

Species of Thailand

River toad

Phrynoidis aspera, Johann Ludwig Christian Gravenhorst, 1829

(In Thai: จงโคร่ง)

The Asian giant toad (Bufo asper), sometimes referred to as the river toad, is a large toad native to southeast Asia.


Bufo asper is generally a dark grey, green, black or brown in color, and is heavily covered in tubercles. These toads can grow to lengths greater than 8.5 inches (22 cm).

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Scientific classification

Phrynoidis aspera

Common names

  • English:
    • Asian giant toad
    • River toad
    • Rough toad
    • Giant Asiatic toad
  • Thai:
    • จงโคร่ง
    • กง
    • หมาน้ำ


  • Nectes obscurus, Thomas Barbour (1904)
  • Bufo asper, Johann Ludwig Christian Gravenhorst (1829)
  • Phrynoidis aspera, Johann Ludwig Christian Gravenhorst (1829)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Phrynoidis aspera - Ngao Waterfall National Park
Phrynoidis aspera - Kaeng Krachan National Park
Phrynoidis aspera - Kaeng Krachan National Park
Phrynoidis aspera - Kui Buri National Park
Phrynoidis aspera (sub-adult) - Kui Buri National Park

Range Map

Distribution map of River toad, Phrynoidis aspera in Thailand
  • Chaloem Rattanakosin National Park
  • Hala-Bala Wildlife Sanctuary
  • Huai Kha Khaeng Wildlife Sanctuary
  • Kaeng Krachan National Park
  • Khao Lak - Lam Ru National Park
  • Khao Luang National Park
  • Khao Nam Khang National Park
  • Khao Nan National Park
  • Khao Phanom Bencha National Park
  • Khao Phra - Bang Khram Wildlife Sanctuary
  • Khao Pu - Khao Ya National Park
  • Khao Sok National Park
  • Kui Buri National Park
  • Mae Nam Phachi Wildlife Sanctuary
  • Ngao Waterfall National Park
  • Sai Yok District, Kanchanaburi
  • Suan Phueng District, Ratchaburi
  • Tarutao National Marine Park
  • Thale Ban National Park
  • Thong Pha Phum District, Kanchanaburi
  • Thung Yai Naresuan Wildlife Sanctuary
  • Ton Nga-Chang Wildlife Sanctuary
Range map of Phrynoidis aspera in Thailand