Buergeria japonica
In 3 days ~80% in a week >90%
The Ryukyu Kajika frog, Japanese Buerger's frog, or Japanese stream treefrog (Buergeria japonica) is a species of frog in the family Rhacophoridae. It is found in the Ryukyu Islands (Japan). Populations from northern Taiwan and the Yaeyama Islands were isolated as a new species(Buergeria choui) in 2020.
Buergeria japonica is a common species that occurs in a wide variety of habitats (rivers, intermittent rivers, freshwater marshes, intermittent freshwater marshes, freshwater springs, geothermal wetlands, irrigated land, and canals and ditches).
It is locally threatened by habitat loss. Buergeria japonica is a small to medium-sized frog, about 3 cm (1.2 in) snout-vent length in males. Buergeria japonica normally breed in slow-moving water in ditches and small streams. However, some Taiwanese populations also breed in geothermal hot springs. In this habitat, frogs can breed throughout the year. Another advantage is that high temperature facilitates growth; furthermore, competition may be reduced in this unusual habitat. Tadpoles can tolerate water temperatures up to about 42 °C (108 °F), however, few tadpoles enter areas of pools where... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Naha | 🇯🇵 Japan |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Sagamigawa Fureai Science Museum | 🇯🇵 Japan |
Likely
About 40% of wildlife watchers report a Ryukyu Kajika Frog sighting in Naha on a given day, based on 27 verified sightings from GBIF citizen-science data. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
October
In that month about 70% of wildlife watchers report a Ryukyu Kajika Frog in Naha on a given day, against under 5% in February and April, the lowest months.
Only Naha, in our data
Naha is the only city on Wallace's Line with enough records to rate Ryukyu Kajika Frog sightings: about 40% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Ryukyu Kajika Frog is recorded against all the amphibians logged in Naha (27 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
