Polyphemus Flower Beetle

Polyphemus Flower Beetle key facts

Care level

Beginner-friendly

Lifespan

Adults 3-6 months

Size

Males 35-80 mm / females 35-55 mm (nominate males 44-72 mm and females 41-50 mm; subspecies confluens males 42-80 mm and females 42-55 mm)

Diet

Fruit, tree sap and beetle jelly

Temperature & Humidity

It comes from rainforest, so keep it at room temperature with the substrate moist, and let it run slightly drier through pupation, which is said to reduce losses.

Breeding & Egg-laying

Larvae grow on a substrate of rotten wood and leaves. To push for large beetles, additives such as silkworm powder, cat food or the larvae of other non-carnivorous species can be used, but they readily bring mites and mould, so watch the amount and the freshness. The one snag is that females lay very few eggs.

Cohabitation

Males fight with their horns, so keep adults singly and put a pair together only for breeding. The larvae can be raised communally as flower beetle larvae usually are, but a crowded container makes failed pupations more likely.

Lifespan & Rearing Period

Because the final instar builds an ovoid cocoon attached to a firm surface, leave the container undisturbed once pupation starts.

Health & Notes

Importing live beetles requires the species identification certificate demanded for live Scarabaeoidea. The nominate form and subspecies confluens differ in both range and size, so do not breed unlabelled stock together.

About Polyphemus Flower Beetle

A large flower beetle from West and Central Africa. Males have a horn and velvety coloring, females a glossy sheen — an easy-to-breed species suited to beginners.

7 things to know before welcoming a Polyphemus Flower Beetle

1. 1Beginner-friendly to keep

   This species is classified as beginner-friendly and is considered relatively easy to breed across generations among flower beetles. Basic insect-keeping knowledge is enough to get started comfortably.

2. 2Visual differences between sexes

   Males have a forward-pointing horn and a velvety body color, while females lack the horn and show a more pronounced sheen. Deciding which look you prefer is worth considering before bringing one home.

3. 3Adult size varies by lineage

   Adult size ranges roughly from 35 to 80mm in males and 35 to 55mm in females, with some variation between subspecies. Plan enclosure space with this range in mind.

4. 4Native to tropical forest habitat

   Since this species lives in the tropical forests of West and Central Africa, aiming for warm, humid enclosure conditions helps replicate its natural environment. A basic grasp of temperature and humidity management is helpful.

5. 5Larval care is key

   Flower beetle larvae spend a long period developing in substrate, and the condition of that substrate can affect the quality of the resulting adult. It's worth researching substrate replacement timing and monitoring methods before bringing one home.

6. 6Avoid housing multiples together

   Large beetles kept together can fight and damage legs or horns through contact. Housing them individually as a rule, and pairing them only briefly for breeding, is the safer approach.

7. 7Prepare with breeding in mind

   While considered an easy species to breed across generations, egg-laying and larval rearing require adequate space and substrate. Whether you plan to breed them affects what you should prepare in advance, so it's worth thinking this through beforehand.

Frequently asked questions about Polyphemus Flower Beetle

Q.Can beginners keep this species?

A.It's classified as beginner-friendly and considered relatively easy to breed among flower beetles. Basic temperature, humidity, and substrate care are enough to keep it successfully.

Q.How can I tell males and females apart?

A.Males have a forward-pointing horn and a velvety body color. Females lack the horn and show a stronger sheen on their body surface.

Q.How large do adults typically grow?

A.Adults typically measure around 35 to 80mm for males and 35 to 55mm for females, with some variation between subspecies. It's a good idea to prepare enclosure space with this range in mind.

Q.Is it okay to keep several together?

A.As a large beetle species, keeping several in the same enclosure can lead to fighting and damage to legs or horns from contact. It's safer to house them individually and allow contact only briefly during pairing.

Q.Is this species subject to any trade regulations?

A.This species is not subject to CITES. No special procedures are required when acquiring one.

Useful tools for Polyphemus Flower Beetle care

Learn more about Polyphemus Flower Beetle in the encyclopedia

More in this category