Bearded Dragon Brumation: Signs, How Long It Lasts, and What to Do
If your bearded dragon suddenly stops eating, hides more than usual, and seems to sleep all day — your first instinct might be to panic. But in the cooler months of the year, this behavior often has a very natural explanation: brumation. In 2026, confusion between healthy brumation and dangerous illness remains one of the top concerns among new bearded dragon owners.
What Is Brumation?
Brumation is a hibernation-like state that cold-blooded animals enter during winter. Unlike mammalian hibernation, reptiles in brumation don't fall into a deep unconscious state — they slow down dramatically, but can rouse when handled or if temperatures warm.
According to ReptiFiles, brumation is a natural, biologically-driven process triggered by seasonal changes in light and temperature. In the wild, bearded dragons brumate during Australia's winter. In captivity, many bearded dragons follow this instinct even under artificial lighting.
Key fact: Not all bearded dragons brumate. Some skip it entirely, especially those kept under consistent year-round lighting. This is normal.
Signs of Normal Brumation
- Spending less time basking — moving away from the basking spot earlier in the day
- Seeking cooler areas of the enclosure
- Sleeping longer and waking later
- Reduced appetite — eating little or refusing food entirely
- Hiding or burrowing — trying to dig into the substrate
- Lethargy — much less active than usual
- Color change — some dragons become slightly darker during brumation
Most bearded dragons begin showing brumation signs between October and February (in the Northern Hemisphere), though the timing varies.
How Long Does Brumation Last?
There's no fixed duration. According to Zen Habitats, some dragons slow down for just a few weeks while others remain largely inactive for 2-3 months. Most bearded dragons over 10-12 months old may brumate; juveniles under 10 months rarely do.
Brumation vs. Illness: How to Tell the Difference
This is the critical question. Signs that suggest illness rather than brumation:
| Brumation | Illness |
|---|---|
| Gradual, seasonal onset | Sudden onset at any time of year |
| Responds to handling | Completely unresponsive |
| Weight stable (minor loss OK) | Rapid weight loss (>10% body weight) |
| Normal color | Unusual discoloration, black beard at rest |
| Eyes open when disturbed | Sunken or closed eyes |
| Normal droppings (fewer is OK) | Watery, bloody, or foul-smelling droppings |
If you're unsure whether it's brumation or illness, check whether your dragon is lethargic for concerning reasons — see the full guide.
What to Do During Brumation
- Keep water available. Many brumating dragons will still drink occasionally. Offer a shallow dish.
- Offer food once a week. Even if they refuse it, availability is good. Don't force-feed.
- Weigh weekly. A healthy brumating dragon should not lose more than 10% of their starting body weight. If they do, consult a vet.
- Reduce light gradually. Simulate shorter days by reducing the photoperiod to 10 hours of light per day.
- Maintain temperatures. The enclosure should still have a thermal gradient — brumation isn't about making the enclosure cold, just allowing the dragon to choose cooler spots.
- Do not disturb frequently. Repeatedly waking a brumating dragon stresses them without benefit.
One caveat: always ensure your dragon has had a full fecal parasite exam before entering brumation. Parasites worsen significantly in a slowed-down immune system.
When to See a Vet
Go to an exotic vet if your bearded dragon:
- Loses more than 10% of body weight during the "brumation" period
- Has runny, bloody, or foul-smelling droppings
- Cannot be roused at all by handling
- Has sunken eyes, open-mouth breathing, or visible muscle wasting
- Shows signs of black beard or distress when disturbed
Voyage AI Vet can help you assess whether your reptile's symptoms need urgent care from an exotic vet — starting at $4.99/month. Get an instant assessment anytime, day or night.
Frequently Asked Questions
Q: My bearded dragon hasn't eaten in 3 weeks. Is this brumation? A: Possibly — if it's winter, came on gradually, and your dragon is otherwise alert and maintaining weight. But 3 weeks of not eating warrants a weight check and possibly a vet call to rule out illness.
Q: Should I change the lighting during brumation? A: Reducing the photoperiod to 10 hours of light per day mimics natural winter conditions and may help your dragon complete brumation naturally. Some owners leave lighting unchanged with no ill effects.
Q: Can I take my bearded dragon out during brumation? A: Brief, gentle handling is fine and helps you assess alertness. Extended handling or forcing activity disrupts the process and causes stress. Keep it brief.
Q: Do juvenile bearded dragons brumate? A: Bearded dragons under 10-12 months rarely brumate. If a young dragon becomes lethargic and stops eating, illness should be investigated before assuming brumation.
This article is for informational purposes only and is not a substitute for professional veterinary advice. For exotic pets, always consult a vet with exotic animal experience.