Boreal digging frog
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Common Names
Manchurian Narrowmouth Toad, Digging Frog, Rain Frog, Manchurian Digging Frog, Boreal Digging Frog

The Boreal digging frog, Kaloula borealis, is a species of microhylid, or "narrow-mouthed," frog found in Northeast Asia. Its range covers much of central and northeastern China, the Korean Peninsula, and Jeju Island. Adult boreal digging frogs are roughly 4.5 centimeters in length, round in shape with toad-like speckled skin.

The boreal digging frog is common across much of its range, but is considered endangered in South Korea. It inhabits cultivated fields, including rice paddies, and is often found in close proximity to humanity, at altitudes of 10 to 900 meters.

Boreal digging frogs breed during the annual rainy season, around June and July. After the rainy season is over they dig burrows underground, emerging only at night to feed. The eggs are laid in batches of 15-20 in monsoonal pools, with the tadpoles maturing within 30 days, much faster than most other frogs in this area.

http://en.wikipedia.org/wiki/Boreal_digging_frog

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