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Japanese brown frog
The Japanese brown frog (''Rana japonica'') is a species of frog in the Ranidae family, endemic to Japan. Its natural habitats are temperate grassland, rivers, swamps, irrigated land, and seasonally flooded agricultural land.
== Characteristics ==
Defining characteristics include a slender, reddish-brown body with a long, narrow head. The average snout-vent length is 48 mm for males. Females are usually much larger than males, with lengths of about 54 mm. Neither gender has a vocal sac, but males develop yellowish-brown nuptial pads and sing during mating season (which lasts from January to March). Songs consist of 10 to 20 notes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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