AmphibiaWeb - Kaloula borealis


(Translations may not be accurate.)

Kaloula borealis (Barbour, 1908)
Boreal Digging Frog
family: Microhylidae
subfamily: Microhylinae
genus: Kaloula

© 2009 Pierre Fidenci (1 of 7)

AmphibiaChina 中国两栖类.

Conservation Status (definitions)
IUCN Red List Status Account Least Concern (LC)
National Status Republic of Korea: Endangered Class II
Regional Status None
Access Conservation Needs Assessment Report .



View distribution map in BerkeleyMapper.
View Bd and Bsal data (6 records).

The body is stocky, with a small head and short, rounded snout. The dorsal skin is covered by irregularly scattered spots, and the ventral part is grey/white with scattered yellow speckles. There is no difference in size between males and females, however, males have folded vocal sacs and distinct black speckles in the throat area. Males do not have nuptial pads during breeding season.

Distribution and Habitat

Country distribution from AmphibiaWeb's database: China, Korea, Democratic People's Republic of, Korea, Republic of


View distribution map in BerkeleyMapper.
View Bd and Bsal data (6 records).

This species is found in China, the Democratic People's Republic of Korea, and the Republic of Korea. It lives in paddy fields and other cultivated fields, at elevations between 10-900 m asl (Matsui and Wenge 2004). It breeds in ponds, ditches, and rainwater pools.

Life History, Abundance, Activity, and Special Behaviors
Usually breeds during the rainy season. In the Republic of Korea, the breeding season occurs between June and July. These frogs otherwise hide in burrows and are nocturnal.

Trends and Threats

In the Republic of Korea, habitat loss (rice paddies, ditches and ponds) has caused K. borealis population numbers to decline.

Possible reasons for amphibian decline

General habitat alteration and loss
Drainage of habitat
Local pesticides, fertilizers, and pollutants


Song, J.-Y. (2007). A Field Guide Book of Amphibians and Reptiles in the Korean National Park, National Park Research Institute, Annual Report No. 2007-3. KNPS, Korea.

Originally submitted by: Pierre Fidenci (first posted 2009-06-22)
Edited by: Kellie Whittaker (2009-06-22)

Species Account Citation: AmphibiaWeb 2009 Kaloula borealis: Boreal Digging Frog <> University of California, Berkeley, CA, USA. Accessed Apr 20, 2024.

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Citation: AmphibiaWeb. 2024. <> University of California, Berkeley, CA, USA. Accessed 20 Apr 2024.

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