Dorcus rectus
In 3 days ~30% in a week ~60%
Dorcus rectus, the little stag beetle, is a species of beetles in the family Lucanidae. It can be found in China(Liaoning), Korea, Japan, Russia. These beetles have a distinctive red shell that separates them from Dorcus curvidens. Males of this species have been observed to have mandible trimorphism, a characteristic that has only been described in two species of Lucanidae—with the other one being Odontolabis cuvera—"and a small number of other invertebrates" as of 2017. The mandibles are used by males as weapons. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Little Stag Beetle sighting in Tokyo on a given day, based on 333 verified sightings from GBIF citizen-science data. It is the 46th 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.
June and August
In those months about 20% of wildlife watchers report a Little Stag Beetle in Tokyo on a given day, against under 5% in February–March and November, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Little Stag Beetle sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
5th of 7
Of the 7 cities where we can rate Little Stag Beetle sightings, Tokyo ranks 5th at about 10%. The best odds are in Nagoya (Japan, about 20%), Busan (South Korea, about 20%) and Sapporo (Japan, about 20%).
GBIF citizen-science records
It is estimated from how often the Little Stag Beetle is recorded against all the insects logged in Tokyo (333 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.
