The Hercules beetle is the world's longest beetle, with spectacular horned males, and a centerpiece of the beetle-keeping hobby. Long larval development and strict import rules make it an advanced, regulated species — live import into the US is prohibited without a USDA APHIS permit, which is generally not issued to hobbyists.
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One of the largest beetles; males up to 17 cm (7 in) including the huge horn.
Lifespan
1–2 years
Social needs
solo
Native region
Central and South America (rainforests)
Origin
New World
Climate
🌴 Tropical
Family
Scarabaeidae
Genus
Dynastes
Part of the Beetles
Kept beetles (order Coleoptera), including rhinoceros, stag, and flower beetles, are display invertebrates with a buried larval (grub) stage that feeds on decaying wood or leaf litter and a short-lived adult stage. Most are docile and harmless to handle, but many are non-native and tightly regulated, with live import banned or permit-restricted in countries like the US.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Photo coming soon
Minimum
Adult display enclosure
18 × 12 × 12 in, deep substrate
Adult Dynastes hercules males are huge — give them floor space and headroom plus sturdy climbing wood. Larvae need 1.5–2 years in deep fermented oak/beech flake-soil at ~22 °C in large individual containers (~8 L) to grow full-size horns.
Photo coming soon
Recommended
Adult bioactive vivarium
24 × 18 × 18 in, bioactive
A roomy bioactive adult enclosure with leaf litter, cork bark, banana/jelly feeders, and gentle humidity. House males alone or carefully pair for breeding — males fight.
Photo coming soon
Ideal
Adult display + larva-rearing rack
36 × 18 × 18 in adult + 8 L larva tubs
A large display vivarium for adults plus a dedicated rack of 8 L individual larva containers managed for temperature. Necessary for full-size, full-horned adults.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Egg
Insects begin as eggs, laid singly or in clusters on or near a food source. Egg size, shape, and incubation time vary widely; some are glued to surfaces, others inserted into plant tissue or soil.
Photo coming soon
Larva / Nymph
The immature stage either looks grub- or caterpillar-like and very different from the adult (a larva, in beetles, flies, and butterflies) or like a wingless miniature adult (a nymph, in roaches, mantises, and stick insects). It eats and molts repeatedly as it grows.
Photo coming soon
Pupa
In insects with complete metamorphosis, the larva pupates — often in a cocoon, chrysalis, or sealed cell — and its body is reorganized into the adult form. Nymph-developing insects skip a true pupa and molt straight to the adult.
Adult
The adult is the sexually mature, usually winged stage with the species' full coloration and form. Adults are typically the dispersing and reproducing stage, and in many insects do not grow further once mature.
Habitat & enclosure
Larvae are raised individually in deep containers of fermented hardwood substrate (flake soil); the giant grubs need many months in rich, decaying wood to grow. Adults are kept in a roomy terrarium with bark, branches, and humid substrate at warm temperatures (around 20-25 C). Males are kept apart, as they fight.
Substrate
Deep (15+ cm) fermented hardwood 'flake soil' for larvae, kept moist; adults need a humid coco-fiber/soil layer with bark for grip and digging.
Equipment & setup
Deep larval containers, quality flake soil, a warm humid adult terrarium with bark and branches, beetle jelly, and temperature/humidity control. A permit is required to import legally to the US.
Diet
Larvae feed entirely on decaying hardwood/flake soil, which must be kept moist and replenished as they consume it. Adults eat sugary foods — beetle jelly, banana, and other ripe fruit. Provide adults constant access to jelly and remove spoiled fruit.
Behavior & temperament
Undergoes complete metamorphosis with a long larval stage (often a year or more) before a short-lived horned adult. Males use the great horns to wrestle rivals over females and can fly. Adults are nocturnal. Larvae are huge, docile grubs that burrow constantly through their substrate.
Health
Demanding because of the long larval phase: poor or dry substrate, wrong temperature, or contamination stunts or kills grubs. Maintain high-quality fermented flake soil, stable warmth, and humidity. Adults are short-lived once emerged. US keepers must note that live import is prohibited without a USDA APHIS permit, rarely granted to hobbyists.
Tips, DIY & hacks
Success hinges on substrate quality — use well-fermented flake soil and keep it moist for the long larval stage. Sex larvae before adulthood by the male's belly marking, and house adult males separately to prevent fighting.
