As the days shorten, some adult bearded dragons start acting strange: ignoring food, hiding in the cool corner of the enclosure, and sleeping far more than usual. Very often nothing is wrong. The dragon is entering brumation, the reptile equivalent of hibernation, driven by the seasonal drop in daylight. Knowing what is normal and what is not is the key to getting through autumn without panic.
What Brumation Is, and Who Does It
In the Australian wild, bearded dragons brumate through the winter when food is scarce and sunshine is limited. That instinct survives in captivity, so many pet dragons slow down every autumn even though their enclosure stays warm. Brumation typically affects healthy adults of about twelve months and older, and it lasts roughly four to sixteen weeks, with huge individual variation. Some dragons brumate every year, some only occasionally, and some never do it at all. One rule is firm: babies under about ten months should not brumate, so a juvenile showing these signs needs a vet, not a blanket.
Early Signs to Watch For
Brumation usually ramps up over several weeks rather than arriving overnight:
- Gradual loss of interest in staple greens, vegetables, and feeder insects
- More napping in shaded hides instead of basking and watching the room
- Slower, less frequent movements and reduced interest in interaction
- Retreating to the coolest, darkest part of the enclosure or burrowing into substrate
- Bowel movements becoming infrequent as the gut slows
Brumation or Illness? The Differences That Matter
Brumation is a behavior change in a healthy animal. Illness looks different, and the contrast is easiest to see side by side:
| Observation | Normal brumation | Possible illness |
|---|---|---|
| Weight | Stable week to week | Steadily dropping |
| Color | Normal tones | Darkened body or black beard |
| Response when disturbed | Sluggish but responsive | Limp, unresponsive, or trembling |
| Age and season | Adult, autumn or winter | Any age, any season |
| Digestion | Just quiet | Diarrhea, straining, or a bloated belly |
If in doubt, book a vet visit and a fecal test before letting your dragon settle in. A heavy parasite load plus a slowed metabolism is a dangerous combination, and ruling out parasites is the single most useful pre-brumation check.
Supporting a Healthy Brumation
Before your dragon shuts down completely, make sure the last meal has fully passed through the gut, because undigested food can rot in a cooled digestive tract. Offer a warm bath, confirm fresh water is always available, and keep the lighting and heating on their normal schedule unless your vet advises otherwise. During brumation, resist the urge to dig your dragon up for photos, keep water topped up, and weigh them every one or two weeks to confirm the weight is holding. When spring arrives and your dragon wakes, rehydrate first with a bath, then offer small meals and rebuild the supplement routine gradually.
Brumation is not a problem to solve but a season to respect. A stable-weight, responsive dragon sleeping through autumn is doing exactly what millions of years of biology tell it to do.