Dorcus Bucephalus
The Dorcus Bucephalus is a large and impressive species that inhabits Southeast Asia, specifically only on Java Island in Indonesia. The size ranges from 50mm to 90mm for males and 40mm to 50mm for females. Unlike other flat stag beetles, the Daioh is classified as a distinct species, differing from the Palawan, Mindanao, Sumatra, and Celebes flat stag beetles.
A notable characteristic of the male Daioh is its particularly aggressive temperament. It is highly recommended to avoid housing males and females together in the same breeding case. The male’s body is distinguished by its large mandibles, which are sharply curved at the tips. The body is very broad, giving it a sense of heft, truly resembling a "moving, glossy black tank." Depending on the region, there are differences between specimens; those from East Java tend to be slightly more slender with less pronounced mandible curves compared to those from West Java. Due to its distinctive body type, the Daioh remains very popular and is relatively easy to obtain in Japan at an affordable price, with many wild specimens being imported.
The larval period for males is about one year, while it takes about six months for females, although this varies depending on temperature. Both mushroom-based culture and fermented substrate support their growth. Pairing should always be conducted under supervision. Unlike other beetles, it is rare to see a Daioh male and female feeding on jelly or resting together under logs. If any signs of danger are observed during pairing, separate the male and female immediately, as the female may otherwise be killed in one blow due to the strength of the male’s mandibles.
Once successful pairing is achieved, egg-laying is straightforward. For breeding, place moisture-rich fermented substrate in the breeding container and completely bury soft oak or Quercus logs in it, packing it tightly. A temperature range of 20°C to 25°C is ideal. The Daioh flat stag beetle appears to be relatively sensitive to heat but more tolerant to cold. Be especially cautious of high temperatures and humidity in the summer. Larvae can still be active even at temperatures as low as 5°C. It is believed that they can survive winter as long as the temperature does not drop below 10°C.
