Trypoxylus dichotomus
In 3 days ~50% in a week ~80%
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.
Possible
About 20% of wildlife watchers report a Japanese Rhinoceros Beetle sighting in Nanjing on a given day, based on 64 verified sightings from GBIF citizen-science data. It is the 13th most-seen of the 272 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
July
In that month about 40% of wildlife watchers report a Japanese Rhinoceros Beetle in Nanjing on a given day, against under 5% in November and December, the lowest months. That is one of Nanjing's wettest months, with about 240 mm of rain against 40 mm in December.
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.
4th of 14
Of the 14 cities where we can rate Japanese Rhinoceros Beetle sightings, Nanjing ranks 4th at about 20%. 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 Nanjing (family Scarabaeidae, Scarabs) are Eophileurus chinensis (about 10%), Oriental Flower 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 Nanjing (64 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.
