Japanese Rhinoceros Beetle

Japanese Rhinoceros Beetle

Trypoxylus dichotomus

Daily sighting probability ~10% · With luck
at Daejeon

In 3 days ~30% in a week ~60%

5 Verified sightings at Daejeon
10 In 1 park From 2019 to 2026
August Best month
☀️🌙 Day & Night When it's spotted

About the Japanese Rhinoceros Beetle

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 →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Taroko National Park 🇹🇼 Taiwan
~10%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Hefei 🇨🇳 China
~30%
2 Nagoya 🇯🇵 Japan
~20%
3 Taipei 🇹🇼 Taiwan
~20%
4 Nanjing 🇨🇳 China
~20%
5 Taichung 🇹🇼 Taiwan
~20%
6 Wuhan 🇨🇳 China
~20%
7 Hangzhou 🇨🇳 China
~10%
8 Osaka 🇯🇵 Japan
~10%
9 Daejeon 🇰🇷 South Korea
~10%
10 Tokyo 🇯🇵 Japan
~10%

Before you go

What are the chances of seeing a Japanese Rhinoceros Beetle in Daejeon?

With luck

About 10% of wildlife watchers report a Japanese Rhinoceros Beetle sighting in Daejeon on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 42nd most-seen of the 53 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.

When is the best time to see a Japanese Rhinoceros Beetle in Daejeon?

August

In that month about 30% of wildlife watchers report a Japanese Rhinoceros Beetle in Daejeon on a given day, against under 5% in September to June, the lowest months. That is one of Daejeon's wettest months, with about 260 mm of rain against 25 mm in January.

What time of day is best to see a Japanese Rhinoceros Beetle?

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.

Is Daejeon the best place to see a Japanese Rhinoceros Beetle?

9th of 14

Of the 14 cities where we can rate Japanese Rhinoceros Beetle sightings, Daejeon ranks 9th at about 10%. The best odds are in Hefei (China, about 30%), Nagoya (Japan, about 20%) and Taipei (Taiwan, about 20%).

Where does the Japanese Rhinoceros Beetle sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Japanese Rhinoceros Beetle is recorded against all the insects logged in Daejeon (5 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.

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