National Institute for Environmental Studies Invasive Species of Japan Japanese | English
  1. Invasive Species of Japan >
  2. Amphibians >
  3. Microhyla okinavensis

Microhyla okinavensis

Basic information
Scientific name Microhyla okinavensis

Click to magnify

Major synonym Microhyla ornata
Common names narrow-mouthed toad, Okinawa rice frog
Higher taxon Microhylidae, Anura, Amphibia
Natural range Amami, Okinawa, and Sakishima Islands including may small islets.
Habitat Lowland forest.
Invasion information
Range in Japan Suwanosejima Is. (Tokara Islands), Taramajima and Kuroshima Is. (Sakishima Islads) Range in Japan
Origin Unknown.
Date Maybe introduced to Taramajima around 1952 and Kuroshima around 1930s.
Route Unknown.
Impact Unknown. Possibly predation on potential prey animals such as ants and competition with native frogs.
Native organism(s) affected: Native frogs (competition), ants (predation).
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries None.
Reference Notes
  • Maeda & Matsui (1999) Frogs and Toads of Japan. Bun-ichi Sogo Shuppan, Tokyo (in Jpn)
  • Maenosono & Toda (2007) Distribution of amphibians and terrestrial reptiles in the Ryukyu Archipelago: A review of published records. Akamata. 18, 28-46 (in Jpn)
  • Ota et al. (2004) Feral populations of amphibians and reptiles in the Ryukyu Archipelago, Japan. Global Environ Res. 8(2), 133-143.
  • Sengoku et al. (eds) (1996) The Encyclopedia of Animals in Japan 5 Amphibians, Reptiles, Chondrichthyes. Heibonsha, Tokyo (in Jpn)
  • Toda & Yoshida (2005) Issues and perspectives regarding invasive alien species of amphibians and reptiles in Japan. Bull Herpetol Soc Jpn. 2005(2), 139-149 (in Jpn)