You check the enclosure one morning and your bearded dragon is completely still, barely responding, and won’t touch food. Your first thought is that something is seriously wrong.
It might be. Or it might be brumation — a completely natural, biological dormancy that healthy adult bearded dragons routinely enter, and one that looks almost indistinguishable from serious illness to an unprepared owner.
This guide tells you exactly what brumation is, how to tell it from illness, how to care for your dragon through it, and what the recovery looks like when it ends.
Quick Answer: What Is Brumation in Bearded Dragons?
Brumation is the reptile equivalent of hibernation — a metabolic slowdown triggered by shorter day length and cooler temperatures. Bearded dragons sleep significantly more, stop eating, seek cool and dark areas, and become minimally responsive. It’s natural and healthy in dragons over 1 year old. In dragons under 1 year old, brumation-like symptoms require an immediate vet check. Typical duration is a few weeks to 4 months.
What Is Brumation?
Brumation is a dormancy state unique to ectotherms (cold-blooded animals). Unlike mammalian hibernation, where the animal enters a near-comatose state, brumation is more variable: the dragon may periodically open its eyes, shift position, or even drink water, but remains largely inactive and disinterested in food for extended periods.
The biological driver is the decrease in daylight hours and ambient temperature that signals winter in the dragon’s ancestral environment (the semi-arid woodlands of eastern Australia). Even captive bearded dragons kept in temperature-controlled homes often retain this seasonal rhythm — their biological clock responds to natural light changes or subtle seasonal cues regardless of the artificial consistency of their enclosure.
Key distinction from mammalian hibernation: A brumating bearded dragon is not in a coma. It may occasionally move, open its eyes, or drink. This is normal. You should still be able to gently rouse the dragon during this period — if the dragon is completely unresponsive to any stimulation, that is concerning and warrants a vet check.
Not all captive dragons brumate. Some individuals never brumate; some brumate every year. Both are completely normal. A dragon that has never brumated is not unhealthy.
Brumation Signs — What to Watch For
The five main signs of brumation onset:
- Sleeping significantly more than usual — extending sleep into basking hours, staying in hides throughout the day
- Complete or near-complete food refusal — dragon shows no interest in insects or vegetables over multiple consecutive days
- Seeking cooler, darker areas — moving away from the basking spot, spending time in hides or the cooler end of the enclosure
- Reduced responsiveness — less reaction to your presence, slower to alert, appears drowsy when disturbed
- Decreased or absent movement — the dragon may remain in the same position for days
Important: These five signs are also consistent with several serious illnesses. Do not assume brumation without working through the differential below.
Brumation vs Sick: How to Tell the Difference
This is the most critical section of this guide. Read it carefully.
Brumation is more likely if:
- Dragon is over 12 months old (brumation before 1 year is not safe — see below)
- Signs appear in late autumn or early winter (though captive dragons can brumate at any time if their internal clock drives it)
- Weight is stable — weigh the dragon; a small, gradual decline is acceptable during brumation, but rapid loss is not
- Eyes are clear and bright when the dragon is briefly roused — not sunken, cloudy, or crusted
- Skin turgor is normal — gently tent the skin on the neck; it should snap back quickly (dehydration = slow return)
- Dragon moves normally when gently handled — it may be sluggish, but it should respond
- Dragon drinks water occasionally if offered
Seek veterinary care promptly if:
- Dragon is under 12 months old — juveniles should not brumate; lethargy in a young dragon is a medical concern
- Rapid or significant weight loss — more than 10% of body weight over 2–3 weeks
- Sunken eyes or visible orbital hollowing — indicates severe dehydration or illness
- Wrinkled, saggy skin that doesn’t return to position promptly when tented
- Laboured, open-mouth, or wheezing breathing at rest — possible respiratory infection
- Neurological symptoms — tremors, twitching, inability to coordinate limbs, loss of righting reflex
- Signs appearing during warm seasons with no seasonal trigger
- Recent husbandry failures — UVB bulb expired, heating failure, dietary problems — brumation-like signs in this context are illness, not natural dormancy
- No response to gentle stimulation — completely unresponsive dragon
→ For a complete differential guide including diagnostic steps, see the brumation vs sick guide.
Before Brumation: The Preparation Checklist
If your dragon is showing early signs of brumation onset, these steps significantly reduce risk:
1. Veterinary check + fecal parasite test
This is the most important step. A dragon with a heavy parasite load that enters brumation is at serious risk — brumation suppresses the immune response that keeps parasite populations in check. A fecal test takes a day or two; the peace of mind is worth it. Request this at a pre-brumation wellness visit.
2. Ensure a bowel movement before deep dormancy
As brumation deepens, digestive activity effectively shuts down. Food remaining in the gut cannot be properly processed and can ferment, causing serious harm. Give the dragon warm 10-minute soaks daily for a few days and stop offering food to allow the gut to clear. Most dragons will have a final bowel movement within a few days of stopping food.
3. Record baseline weight
Weigh the dragon before brumation begins and document it. Check weight every 2–4 weeks during brumation. A small, gradual decline (1–2% per month) is acceptable; any rapid decline warrants a vet check.
4. Confirm enclosure health check
Verify temperatures and UVB are functioning correctly. A brumating dragon in a sub-optimal environment won’t emerge in good condition.
During Brumation: How to Care for Your Dragon
Lighting
Reduce the photoperiod to 6–10 hours of light per day. Do not eliminate light entirely — the dragon needs some daily light exposure even in brumation. Many keepers follow the natural seasonal reduction in daylight at their latitude.
Temperature
Reduce daytime ambient temperature to 64–75°F (18–24°C) — significantly lower than normal active-season temperatures. Nighttime can drop to 60°F (15°C). You don’t need to create artificial cold; simply reduce the heating contribution.
Humidity
Maintain humidity at 30–40%. Brumating dragons are more vulnerable to respiratory issues if humidity is too high.
Water
Keep fresh, clean water available in a shallow dish. Some brumating dragons will occasionally drink — this is normal. Offer a brief warm soak every 2–4 weeks to maintain hydration.
Food
Do not offer food to a brumating dragon. Offering food and having the dragon eat is not dangerous — if the dragon emerges, alert, and actively eats, that’s fine. But don’t attempt to rouse or tempt a fully dormant dragon to eat. Undigested food in a metabolically slowed gut can cause serious problems.
Handling
Minimize handling to brief welfare checks every few days — a gentle visual inspection to confirm the dragon is breathing, hasn’t fallen awkwardly, and has normal skin condition. Do not attempt to “wake” the dragon with prolonged handling or stimulation.
Duration
Typical brumation duration: a few weeks to 4 months. Some individuals brumate for up to 8–9 months (rare). If your dragon has been brumating for more than 4 months, consult a reptile vet — not because this is necessarily abnormal, but to confirm the dragon is in good condition.
After Brumation: Waking Up and Recovery
Signs the dragon is coming out of brumation:
– Emerging from the hide more frequently
– Eyes open, alert, tracking movement
– Moving toward the basking spot voluntarily
– Beginning to show interest in surroundings
Recovery sequence:
- Gradually restore normal lighting over 3–5 days — increase photoperiod back toward 12–14 hours
- Restore normal temperatures — bring basking spot back to 108–113°F / 42–45°C, cool side 80–85°F / 27–29°C
- Offer fresh water immediately; provide a warm soak on the first or second day
- Offer food within 24–48 hours of the dragon showing normal activity — start with favourite insects or vegetables
- Expect a slow appetite return — it may take several days to a week for the dragon to eat enthusiastically again; this is normal
Post-brumation checks:
- Weigh the dragon. Compare to pre-brumation weight. Moderate loss is expected; significant muscle wasting warrants a vet assessment before resuming high feeding.
- Check for dehydration signs (skin turgor, eye condition) and offer extra soaks if needed.
- In adult males: expect peak hormonal display (black beard, head-bobbing) in the weeks following brumation — this is entirely normal.
Can You Prevent Brumation?
You cannot forcibly prevent brumation without causing stress. Attempting to artificially keep temperatures and lighting high to override brumation is stressful for the dragon and doesn’t always work.
You can reduce brumation likelihood by maintaining a consistent 14-hour photoperiod year-round and stable temperatures. Some dragons kept on this schedule never brumate. Others still follow their internal clock regardless.
For dragons under 12 months old: If a juvenile shows brumation-like signs, contact your reptile vet immediately. Young dragons need regular nutrition for bone development and growth — brumation before 12 months can cause serious harm.
Quick Reference: Brumation Care Parameters
| Phase | Action |
|---|---|
| Pre-brumation | Vet check + fecal test; clear gut; record weight |
| During — lighting | 6–10 hours per day |
| During — temp (day) | 64–75°F / 18–24°C |
| During — temp (night) | Floor 60°F / 15°C |
| During — food | Offer only if dragon actively emerges and asks |
| During — water | Fresh water always available; soak every 2–4 weeks |
| During — handling | Welfare checks only; do not force wake |
| Max normal duration | 4 months (consult vet if longer) |
| Post-brumation | Restore lighting/temps gradually; water first; food within 48h |
Brumation is one of the most alarming things to witness as a new owner — and one of the most manageable once you know what to expect. A healthy adult dragon that brumation is simply doing what its biology has prepared it for. Your job is to prepare beforehand, monitor without interfering, and support recovery when it ends.
Not sure if it’s brumation or illness? The brumation vs sick guide walks through the full differential with specific decision steps.
Frequently Asked Questions
Does this brumation guide cover how to tell the difference between brumation and illness?
The key differentiators are introduced here — particularly the red flags that suggest illness over brumation. For the full structured differential with a decision table comparing specific signs across six criteria, see the dedicated brumation vs sick guide. That article is designed to be read alongside this one when you’re actively managing an uncertain situation.
Is it normal for a dragon under 12 months to show brumation signs?
No — and this is a critical point. Dragons under 12 months should not brumate. A juvenile showing reduced activity, appetite loss, and increased sleep during cooler months may be responding to environmental changes, but should be monitored closely and evaluated by a reptile vet before any reduction in care intensity. Brumation in a juvenile risks compromising the bone development and growth that requires consistent nutrition.
Does this guide cover what to feed during brumation?
Yes — the care parameters table specifies that food should only be offered when the dragon actively emerges and indicates readiness. The guide explains why force-feeding a brumatng dragon causes harm (impaction risk from food that won’t be digested). For the normal adult feeding framework outside of brumation, see the feeding schedule.
Should I turn off all lighting during brumation?
No. Lighting is reduced (to 6–10 hours per day) but not eliminated. A complete light cycle is not needed during dormancy, but some light exposure maintains the photoperiod signal and supports basic biological rhythms. Night-time heat should be maintained if temperatures drop below 60°F / 15°C — using a lightless heat source only. See the lighting schedule guide for the full photoperiod adjustment approach.
Can a pre-brumation vet check really prevent problems, or is it optional?
It’s strongly recommended, not just optional. A pre-brumation fecal parasite screen is the specific reason — parasites that are tolerable during active periods become significantly more problematic during brumation when immunity is lower and the dragon isn’t eating to maintain condition. Discovering a parasite burden before brumation and treating it first prevents a minor issue from becoming a major health crisis by the time the dragon re-emerges.
This article is educational and does not replace professional exotic veterinary advice. If your bearded dragon is under 12 months old and showing brumation-like signs, or if any of the escalation signs listed above are present, contact a qualified reptile vet promptly.