Giant Stag Beetle

The Giant Stag Beetle (Dorcus titanus titanus or Serrognathus titanus) is an insect in the Lucanidae family of stag beetles. 

The Giant Stag Beetle has an elongated flat, dull black body. It has black antennae and black legs. The male has antler-like jaws with small teeth. The female has much smaller jaws. 

Giant Stag Beetle (female)

It grows to about 5-10 centimetres (2-4 inches) long. 

The Giant Stag Beetle is widespread and native to Japan, Indonesia, the Philippines, Malaysia, Thailand, Vietnam, Laos, Myanmar, Cambodia, India, Taiwan, Korea, and China.  

It prefers tropical rain forests. 

It feeds on tree juice, called sap. 

The female lays eggs in rotten wood. The eggs hatch into larvae after about 30 days. The larvae (grubs) feed on rotten wood. The duration of the larval phase is about one year. The larvae metamorphoses into the adult beetle. 

Giant Stag Beetle (female)
Giant Stag Beetle (female)
Giant Stag Beetle (female)
Giant Stag Beetle (female, upside down)

Photographer: Martina Nicolls


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