Zhangixalus arboreus
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~10% in a week ~20%
Zhangixalus arboreus, also known as the forest green tree frog and Kinugasa flying frog, is a species of frog in the family Rhacophoridae endemic to Japan, where it has been observed on Honshu island, between 10 and 2350 meters above sea level.
The adult male frog measures about 42–60 mm in snout-vent length and the adult female frog about 59–82 mm. They have more webbed skin on their front feet than on their hind feet. The skin of the dorsum is bright green, sometimes with spots. The skin of the belly is white with brown spots. The iris of the eye is red-brown in color.
The natural habitats of Z. arboreus are subtropical or tropical moist lowland forest, freshwater marshes, and irrigated land. These small tree frogs spend their adult lives in trees and forests, and in breeding season gather around water sources to mate. They lay their eggs within a batch of sponge-like foam which is suspended from a tree branch, usually hanging over a pond, marsh, or slow-flowing stream. The tadpoles emerge from the eggs, wiggle their way out of the foam, and drop down into the water below. These batches of foam can often be seen hanging over ponds in... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Sunshine Aquarium | 🇯🇵 Japan |
Rare
Under 5% of wildlife watchers report a Forest Green Treefrog sighting in Tokyo on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 10th most-seen of the 11 amphibians we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June
In that month about 10% of wildlife watchers report a Forest Green Treefrog in Tokyo on a given day, against under 5% in July to May, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Forest Green Treefrog sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
2nd of 2
Of the 2 cities where we can rate Forest Green Treefrog sightings, Tokyo ranks 2nd at under 5%. The best odds are in Osaka (Japan, about 10%).
GBIF citizen-science records
It is estimated from how often the Forest Green Treefrog is recorded against all the amphibians logged in Tokyo (6 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.
