Giraffa Stag Beetle

Giraffa Stag Beetle key facts

Care level

Intermediate

Lifespan

Adult 6-12 months, larva 8-12 months

Size

Up to 120mm

Diet

Beetle jelly (adult), fermented substrate (larva)

Temperature

22-27°C

Larval care

Fermented substrate or mushroom bottle

Mandibles

Large mandibles but generally docile

Adult care

Careful pairing — females may be killed

Notes

Large size requires good larval nutrition and temperature

About Giraffa Stag Beetle

The Giraffa Stag Beetle (Prosopocoilus giraffa) is the world's largest stag beetle, distributed across the islands of Southeast Asia, including Indonesia and the Philippines. Specimens from Flores Island, Indonesia are especially prized for their sheer size — the mandibles can account for more than half the beetle's total body length, creating a silhouette unlike any other insect. Its name is a nod to the giraffe, referencing those extraordinary, elongated jaws. In terms of temperament, the species is relatively calm, and handling is possible, though caution is always warranted given the strength of its mandibles. What makes keeping this beetle so rewarding is the combination of its commanding visual presence and the depth of experience that comes with attempting to breed it. Raising larvae through to adulthood offers daily discoveries, and the satisfaction of successfully eclosing a large male is a highlight of the hobby.

7 things to know before welcoming a Giraffa Stag Beetle

1. 1Size Varies by Origin

   The Flores Island subspecies is known to produce the largest individuals, followed closely by the Palawan Island population. Body size, mandible shape, and coloration differ by locality, so always check the origin information when purchasing.

2. 2Adult Lifespan Is Short

   Adults typically live only 6 to 12 months, which is shorter than the larval stage of 8 to 12 months. Avoid disturbing the beetle right after eclosion; wait until it begins feeding on its own before handling it, as this helps extend its lifespan.

3. 3Large Enclosure Required

   Due to their large size, a container of at least 60cm is recommended. In cramped enclosures, they can become stressed and may attempt to force their way out with their powerful mandibles, so always ensure the lid is securely fastened.

4. 4Temperament Varies by Individual

   Males have powerful mandibles that can cause a painful pinch, so handle them by gently picking them up from behind. Females are generally calmer, but their leg spines can scratch if startled, so careful handling is still advised.

5. 5Larvae Need Fermented Mat

   Larvae are best raised in finely textured, twice-fermented substrate rather than fungal logs. Replace the substrate every 2 to 3 months, watching for deterioration or dryness, to support healthy larval development.

6. Optimal Temp Around 25°C

Frequently asked questions about Giraffa Stag Beetle

Q.What is the difference between Flores Island and other localities?

A.Flores Island specimens are considered the largest among all localities, with especially well-developed mandibles. Other origins such as Sulawesi and the Philippines are also appealing, but if maximum size is your goal, Flores Island is the standard choice.

Q.Can beginners attempt breeding?

Useful tools for Giraffa Stag Beetle care

Learn more about Giraffa Stag Beetle in the encyclopedia

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