Trypoxylus dichotomus
In 3 days ~30% in a week ~60%
The Japanese rhinoceros beetle (Trypoxylus dichotomus), also known as the Japanese rhino beetle, the Japanese horned beetle, or by its Japanese name kabutomushi (兜虫, 甲虫 or カブトムシ), is a species of rhinoceros beetle. They are commonly found in continental Asia in countries such as China, the Korean peninsula, Japan, Vietnam, Burma, Thailand, and Taiwan. In these areas, this species of beetle is often found in broad-leaved forests with tropical or sub-tropical climates. This beetle is well known for the prominent cephalic horn found on males. Male Japanese rhinoceros beetles will use this horn to fight other males for territory and access to female mating partners. Upon contact, males will attempt to flip each other onto their backs or off of their feeding tree. In response to selective pressures, smaller male T. dichotomus have adapted a "sneak-like behavior". These smaller beetles will attempt to avoid physical confrontation with larger males and try to mate with females.
Trypoxylus dichotomus corniculatus Trypoxylus dichotomus dichotomus: Mainland China, the Korean Peninsula Trypoxylus dichotomus septentrionalis: Honshu, Shikoku, Kyushu, Tsushima Island Trypoxylus... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Japanese Rhinoceros Beetle sighting in Tokyo on a given day, based on 348 verified sightings from GBIF citizen-science data. It is the 47th most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July and August
In those months about 20% of wildlife watchers report a Japanese Rhinoceros Beetle in Tokyo on a given day, against under 5% in March–May and October, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Japanese Rhinoceros Beetle sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
10th of 14
Of the 14 cities where we can rate Japanese Rhinoceros Beetle sightings, Tokyo ranks 10th at about 10%. The best odds are in Hefei (China, about 30%), Nagoya (Japan, about 20%) and Taipei (Taiwan, about 20%).
Same family: Scarabaeidae
The closest relatives of the Japanese Rhinoceros Beetle that you can see in Tokyo (family Scarabaeidae, Scarabs) are Green Chafer (about 20%), Japanese Beetle (about 10%) and Japanese Drone Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Rhinoceros Beetle is recorded against all the insects logged in Tokyo (348 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.
