Japanese Brown Frog
Rana japonica
Silhouette: Sharp Photography, sharpphotography.co.uk · PhyloPic
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassAmphibia (Amphibians)
- OrderAnura (Frogs and Toads)
- FamilyRanidae (Typical Frogs)
- GenusRana (Pond Frogs)
- SpeciesRana japonica (Japanese Brown Frog)
About the Japanese Brown Frog
The Japanese brown frog (Rana japonica) is a species of frog in the family Ranidae, endemic to Japan. Its natural habitats are temperate grassland, rivers, swamps, irrigated land, and seasonally flooded agricultural land.
Defining characteristics include a slender, reddish-brown body with a long, narrow head. The average snout-vent length is 48 mm (0.157 ft) for males. Females are usually much larger than males, with lengths of about 54 mm (0.177 ft). 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.
R. japonica occurs in Honshu, Shikoku, and Kyushu in Japan to the southern region of China. Within Japan, it inhabits mostly hillsides and plains and is rarely seen in mountain ranges. More specifically, the brown frog resides in temperate grasslands, hillsides, plains, rivers, swamps, irrigated land, and seasonally flooded agricultural land.
By combining two types of recessive genes that cause frogs to become translucent, a breed of Rana japonica, popularly called "see-through frogs", was produced by... Wikipedia →
Recent sightings of Japanese Brown Frog in Nikko National Park
LIVEiNaturalistClosest Relatives at Nikko National Park
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Global Distribution
Warmer areas are where this animal is recorded most often.
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
Quick answers
What are the chances of seeing a Japanese Brown Frog in Nikko National Park?
About 30% of wildlife watchers report a Japanese Brown Frog sighting in Nikko National Park, based on 7 verified sightings from GBIF citizen-science data.
When is the best time to see Japanese Brown Frog in Nikko National Park?
August has the highest sighting rate for Japanese Brown Frog in Nikko National Park in our monthly data.