Intermedia shining stag beetle

Intermedia shining stag beetle key facts

Care level

Advanced

Lifespan

1.5-2 years to adulthood for males, over a year for females

Size

38-106mm (captive record 106.2mm)

Diet

Adults take sap or beetle jelly; larvae eat dark, well-fermented substrate and spent fungus-bottle contents

Temperature & Humidity

It is cold-sensitive, so heat it in winter. Rearing larvae cooler and in larger containers is said to help produce large long-jawed males.

Breeding & Egg-laying

Pack dark, well-fermented or rhinoceros-beetle substrate firmly 3-5cm deep in a small container, then fill loosely to about 70% of its depth, at a moisture that holds together when squeezed. Females lay readily in this set-up.

Food & Feeding

Larvae are heavy feeders and build chambers; give spent fungus-bottle contents or used substrate. Breaking the cocoon at the prepupal stage often kills them, so leave the container closed then.

Lifespan & Rearing Period

Males take 1.5-2 years and females over a year to reach adulthood. Apart from cold sensitivity and slow growth, it is considered fairly easy to keep.

Cohabitation

It is extremely combative, rearing up with its jaws and clamping any animal that approaches. Males can kill a female they do not accept, so house singly and supervise pairings.

Health & Notes

It is treated either as a subspecies of O. dalmanni or as a species, and resembles both the Mindoro form rudicae and O. alces, so confirm locality and scientific name. Importing foreign stag and rhinoceros beetles is regulated by the Plant Protection Act and the Invasive Alien Species Act (species-name certificate), with each species needing clearance from the Plant Protection Station, so domestically bred stock is the safe choice. Never release captive beetles.

About Intermedia shining stag beetle

A large, glossy stag beetle native to Palawan Island in the Philippines, prized for its lacquer-like sheen and the bold mandible tooth large males develop. It is sensitive to cold and slow to grow, but otherwise considered relatively easy to keep.

7 things to know before welcoming a Intermedia shining stag beetle

1. 1Keep It Warm and Keep It Alone

   Apart from being sensitive to cold and slow to grow, this species is considered relatively easy to keep. Keep it warm in winter, and because it is extremely combative — males can kill females — house it singly and supervise closely during pairing.

2. 2Males Take 1.5–2 Years to Mature

   Males spend a long time in the larval stage, taking roughly 1.5 to 2 years to reach adulthood. Patience is part of the hobby with this species — growth simply can't be rushed.

3. 3Females Mature a Bit Faster

   Females tend to develop faster than males, reaching adulthood in a year or more. It helps to know upfront that males and females mature on different timelines.

4. 4Adults Can Top 100mm

   Adult body length varies quite a bit, ranging from about 38mm to 106mm. A captive-bred record of 106.2mm has been reported, so there's genuine potential for a large specimen.

5. 5A Lacquer-Like Sheen

   Its body carries a sheen so strong it looks freshly lacquered, living up to the "shining stag beetle" name. The glossy finish shifts subtly depending on the angle and light.

6. 6Pronounced Mandible Tooth

   Large males develop a prominent inner tooth at the base of the mandibles. In Japan it's often classified as a subspecies of the Dahlman shining stag beetle, so comparing the two side by side can be interesting.

7. 7Prepare Your Setup First

   This species comes from warm, humid regions like Palawan Island, so it's worth setting up a temperature- and humidity-controlled enclosure before bringing one home. Make sure you have the right knowledge and equipment ready in advance.

Frequently asked questions about Intermedia shining stag beetle

Q.Is this beetle suitable for beginners?

A.Apart from being sensitive to cold and slow to grow, it is considered relatively easy to keep. Winter heating is essential, and because it's extremely combative it should be kept singly. The long larval stage makes it best for keepers who don't mind waiting.

Q.How large does it grow?

A.Adult body length varies from individual to individual, ranging roughly from 38mm to 106mm. A captive-bred record of 106.2mm has been reported, so there's genuine potential for a large specimen.

Q.How long are the larval stage and lifespan?

A.Development from larva to adult takes 1.5 to 2 years for males and a year or more for females. There is little information on how long adults live once they emerge.

Q.What should I feed it?

A.Insect jelly made for stag beetles is the standard food. Replace it regularly so a fresh supply is always available.

Q.Is it covered by CITES?

A.The Intermedia shining stag beetle is not covered by CITES. Its lacquer-like sheen is part of what makes it a beetle that draws attention from collectors.

Useful tools for Intermedia shining stag beetle care

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