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How to Keep Adult Beetles

Everything you need to know about housing, feeding, and caring for adult beetles — stag beetles, rhino beetles, and flower beetles. A complete beginner's guide.

Housing & Enclosure

Adult beetles need a simple setup — a container with substrate, something to climb on, and food. The container just needs to be slightly wider than the beetle's body length so it can turn around comfortably.

Wider than body
Min. Container Size
Thin layer
Substrate Depth
Ventilated
Lid Type
Example beetle enclosure setup with substrate, bark, and food

Example setup — container with substrate, climbing bark, hide spots, and food

What You Need

Warning — Avoid Coconut Fiber

Do NOT use coconut fiber (coco coir) as substrate for adult beetles. The big, rough pieces can get caught in their legs and joints, causing injury. Stick to wiping paper, sliced sawdust, or sphagnum moss.

Tip

Always add climbing objects like sticks and bark. If a beetle flips on its back and can't grab anything to turn over, it will exhaust itself and die.

Temperature & Humidity

Each beetle type has a different preferred temperature range. Avoid direct sunlight — beetles cannot regulate their body temperature and will overheat.

20-28 °C
General Range
60-80%
Humidity
No Sun
Direct Light

Temperature Guide by Type

Rhino Beetles
23-27 °C (73-81 °F). Dynastes hercules, Chalcosoma, Japanese rhino beetles, and most other rhino beetle species.
Stag Beetles
20-23 °C (68-73 °F). Rainbow stag beetles, Dorcus, Lucanus, and most stag beetle species prefer slightly cooler conditions.
Flower Beetles
22-28 °C (72-82 °F). Flower beetles tolerate the widest temperature range and are generally the most adaptable.
Note

These are general guidelines — not all species within each type have the same requirements. Always research the specific species you're keeping for the best results.

How to Maintain Humidity

Mist the substrate with a spray bottle every 1-2 days. The substrate should feel slightly damp but not wet or muddy. A simple test: squeeze a handful of substrate — if a few drops come out, the moisture is perfect. If water streams out, it's too wet.

Warning

Too wet = mold and bacteria growth, which can harm your beetle. Too dry = beetle dehydrates. Aim for "damp sponge" level moisture.

Feeding

Adult beetles eat tree sap, honey, and fruit in the wild. In captivity, the best natural food is honey — it's nutritious and beetles love it. Fruit is a good second option, and beetle jelly is the most convenient choice for easy maintenance.

Beetle food options — honey, beetle jelly, and fresh fruit

Best food options — Honey (best natural food), Beetle Jelly (most convenient), Fresh Fruit (second option)

Best Foods

Tip

You do NOT need to provide water — beetles get all the moisture they need from food and substrate.

Weekly Care Schedule

Adult beetles are low-maintenance. Here's a simple weekly routine to keep them healthy:

Mon Tue Wed Thu Fri Sat Sun
🍯 Change Food ✓ ✓
👁 Check Beetle ✓ ✓
💧 Mist Substrate ✓ ✓
♻ Change Substrate ✓
🚽 Clean Container ✓
Twice a week
Once a week
Note

This schedule is just an example — you can pick any 2 days for food/misting and 1 day for cleaning. The important thing is consistency. Most beetles rest during the day and become active at night.

Keeping Males & Females Together

In general, do not keep multiple males together — they will fight, especially stag beetles and rhino beetles. Males can injure or kill each other.

Warning — Don't Keep Pairs Together Too Long

Keeping a male and female together for a long time will shorten both their lifespans — the male will keep mating with the female repeatedly, exhausting both beetles. The best approach is to keep them together for only 1-7 days (depending on species), then separate them.

Stag Beetles
Keep males separate. Males fight aggressively with their mandibles and can seriously injure each other. Pair with a female for 1-7 days for mating, then separate.
Rhino Beetles
Keep males separate. Males use their horns to flip rivals. Pair with a female for 1-7 days for breeding, then separate.
Flower Beetles
Most flower beetles can be kept communally — multiple males and females in one large container. They are generally peaceful. This is one reason flower beetles are great for beginners.

Common Mistakes