Dorcus curvidens, commonly known as "Ookuwagata," or the "Large Stag Beetle," is a very popular pet in Japan and other places in Asia. They are very common, but can be hard to locate in the wild. Several years ago, an Ookuwagata sold for $20,000 US dollars. They have much longer life spans then most other beetles, up to five years, and are quite hardy and easy to both breed and care for.
Originating in Japan, Taiwan, Thailand, Northeast India, South Korea, and Vietnam, the Ookuwagata has experienced widespread popularity. In the wild, the adult forms usually appear between May and October. They, like many other beetles, go through various forms on their voyage to maturity. The larval stage can last one to two years. During this stage, they feed on decayed wood. They then go through a pupal stage before emerging as adults. The adults can live for three to five years in the right conditions, longer than any other known beetles. As adults in the wild, they feed on the sap of deciduous trees. In captivity, they can feed on any liquid containing fructose. They live mainly in flat areas. They are very hardy, and can withstand the attacks of molds and ticks. They hibernate in cool weather, usually between November and March in Japan. During hibernation, they do not eat. They live in relatively dry areas and do not like humidity. Female Ookuwagatas bore holes in decaying wood and lay eggs therein. Females prefer darkness, especially when breeding.
Both male and female Ookuwagatas are black and can reach up to 68mm in length. The males are usually larger than females. The male's mandibles have teeth near the top, with smaller male's teeth pointing toward the base, intermediate male's pointing inward, and larger male's pointing toward the top. The smaller males and the females are shinier and have lines of dots on the back.
A large plastic container with air holes will make a good home for an Ookuwagata. A good bedding is wood flakes from broad trees. In Japan, "insect mats" are sold which are ideal. Food should be served on a wooden plate to avoid mold and ticks on the mat. They should be sprayed with water from time to time, but excessive humidity will shorten the beetle's lifespan. Ookuwagatas should be fed liquid with fructose (i.e. watered down maple syrup) or other fruits. In Japan prepared foods and vitamins are available for these amazing beetles. Check with your local specialist for availability in your area.
