A small, sunny yellow-and-black flower beetle that's active, colourful and delightfully easy — a brilliant introduction to keeping beetles through their full life cycle.
Sun beetles are small, active, day-flying flower beetles marked in warm yellow and black. They're one of the easiest inverts to keep and breed: adults eat fruit and beetle jelly, while the grubs live in and eat rotting-wood 'flake soil' substrate. Watching the full egg-to-larva-to-beetle cycle is part of the fun — a superb beginner and classroom beetle.
Best for: beginners, children and classrooms wanting an easy, active, breedable beetle with a full life cycle to observe.
💷Costs & Getting Hold of One
The animal
£3–£8 each; nice as a group.
Full setup
£40–£150 (a ventilated tub/terrarium and larval substrate).
Ongoing costs
Very low — fruit and beetle jelly for adults; substrate for larvae.
Availability
Easy; commonly bred.
These are minimums, not budgets. The low end still has to meet the animal's needs — proper UVB, a heat gradient, space and filtration are not optional extras. A vivarium alone can cost £250–£300+, and a tortoise's UVB lamp alone is often ~£100. Price the whole setup before you commit to the animal.
Buying tip: Buy a small group to enjoy breeding. Adults are the active fliers; the grubs live hidden in the substrate.
🏠Enclosure & Where to Keep It
A ventilated tub/terrarium with a deep layer of larval substrate — the grubs live in it, the adults on top.
Group
A ventilated container from 30×20×20 cm.
Substrate depth
A deep layer of 'flake soil' (fermented rotting-wood substrate) for the larvae to live in and eat.
Furnishing
Bark/leaves on top for the adults; a feeding dish.
Where to keep it
Room temperature, out of direct sun.
The larvae eat and live in the substrate — use proper decayed-wood 'flake soil', not plain compost.
🌡️Temperature, Lighting & Humidity
Temperature
Warm room temperature 22–26 °C.
Lighting / UVB
Normal room light; adults are day-active.
Humidity
Lightly moist substrate; occasional misting.
Bedding / substrate
Deep flake soil (fermented hardwood) for the larvae.
🍽️Diet, Supplements & Feeding
Different at each life stage — larvae eat substrate; adults eat fruit.
Adults
Soft fruit (banana, apple) and beetle jelly.
Larvae
They eat the flake-soil substrate itself.
Frequency
Replace adult fruit every day or two before it moulds.
Water
Moisture from fruit and lightly damp substrate.
Remove old fruit promptly to avoid mould and fruit flies; keep the substrate topped up for the growing grubs.
✨Grooming, Shedding & Additional Needs
No grooming; keep the substrate lightly moist and fresh for healthy larvae.
🖐️Handling & Interaction
Adults are sturdy and can be gently handled for short periods — they may open their wing cases to fly, so stay low. Robust and beginner/child-friendly with supervision.
How to handle
Let an adult walk onto your hand; they're tough little beetles but keep sessions brief and low (they fly). The grubs are best left in the substrate.
✅ Do
Let adults walk onto your hand, low down.
Keep sessions brief (they fly).
Supervise children.
Keep substrate fresh for larvae.
Wash hands after handling.
⛔ Don't
Don't dig out and handle the grubs unnecessarily.
Don't let old fruit mould.
Don't use plain compost as larval food.
Don't keep too wet.
Don't be surprised when adults fly off — stay low.
🦎Fun Facts
Adults are day-flying flower beetles in warm yellow and black.
The whole life cycle — egg, grub, pupa, beetle — is easy to observe.
Grubs live in and eat decayed-wood 'flake soil'.
A great, low-cost introduction to beetle-keeping.
Native to West and Central Africa.
⭐Overall Verdict
A sunny, active, dead-easy beetle that's perfect for beginners and classrooms — and breeds readily so you can watch the full life cycle. Give the grubs deep flake soil and the adults fresh fruit, and it's one of the most rewarding starter inverts.