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Lucanidae

Giant stag beetle

Dorcus titanus (syn. Serrognathus titanus)
ด้วงคีม (stag-beetle group; คีม = pincers)
BeginnerNocturnal · sleeping nowHuman-verified sheet
14:00
Day

Drag the sun. Giant stag beetle is nocturnal, so what it is doing changes with the light.

Temperature

20–26°Ambient

One ambient band, 20–26°C. This sheet states no warm side, no cool side and no night figure, so none are shown.

Humidity

60–80%Target RH
Check your setup against this sheet
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The numbers

Enclosure
20 × 15 × 20 cm
Diet
Adults: beetle jelly, banana, sugary fruit; larvae eat rotten wood/flake soil/kinshi · Adults: jelly every 1-2 days; larvae: change substrate every 2-3 mo
Temperature
20-26C
Humidity
60-80%

Identity

Order / Family
Coleoptera
IUCN / CITES
Not evaluated; not CITES
Difficulty
Beginner–Intermediate
Commonality
Very popular; many prized subspecies (palawanicus etc.)
Adult size
Body 30-110mm incl. jaws (subspecies vary); big black mandibles
Lifespan
Larva ~8-14 mo (L1-L3); adult can live 6-12+ mo (long for a stag)
Growth rate
Moderate
Activity & niche
Nocturnal; adults on sap/fruit; larvae in white-rotten hardwood
Temperament
Males + even females aggressive to each other; docile to keeper
Venom / defense
Harmless - no venom; strong pinch from jaws if provoked
Price (THB)
indicative ~150-1,500 (varies hugely by subspecies/size)

Enclosure and conditions

Temperature
20-26C
Humidity
60-80%
Min. enclosure
Larvae: flake soil OR kinshi (mushroom-inoculated) bottles ~0.8-2.3L; adults 20x15x20cm+ for breeding
Substrate
Larvae: white-rotten hardwood / flake soil / kinshi; adults: coco/soil + bark
Hides / decor / water
Bark, hides, egg-laying wood; mist for humidity

Diet

Staple food
Adults: beetle jelly, banana, sugary fruit; larvae eat rotten wood/flake soil/kinshi
Feeding frequency
Adults: jelly every 1-2 days; larvae: change substrate every 2-3 mo
Supplements
Kinshi/protein flake soil for bigger jaws

Behaviour and handling

Handling
Gentle; jaws can pinch; support body
Communal
House individually - even females fight; pair only to breed
Defense / stress signs
Jaw-gaping threat, freezing, leg-tuck

Reproduction

Reproduction
Eggs laid in rotten wood -> L1-L3 grubs -> pupa in cell -> adult; some export criminalised

Common health problems

Common health issues
SignsFailed eclosion, mushy/wet substrate, mites, dehydration
Red flags / quarantine
SignsMites; verify legal import (some regions restrict export); never release

Good to know

  • Prized subspecies fetch high sums; the Palawan form is among the largest stags on Earth

Others in this group

Sources