Boreal digging frog

Its range covers much of central and northeastern China, the Korean Peninsula, and Jeju Island.

[2] Adult boreal digging frogs are roughly 4.5 cm in length, round in shape with toad-like speckled skin.

[4] The boreal digging frog is common across much of its range,[1] but is listed as an "Endangered category II species" in South Korea.

[3][5] It inhabits cultivated fields, including rice paddies, and is often found in close proximity to humanity, at altitudes of 10 to 900 m.[1] Boreal digging frogs breed during the annual rainy season, around June and July.

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.