Leopard Gecko Brumation: What Pet Owners Should Know
| Typical timing | ~October–February |
| Normal signs | Lower appetite, more hiding |
| Watch for | Weight loss, thinning tail, total food refusal |
Brumation vs true hibernation
Brumation is a reptile's version of a seasonal slowdown, not true hibernation — a brumating gecko still wakes, moves, and may eat occasionally, just less than usual. It's driven by day length and, in the wild, temperature and food scarcity.
Pet geckos can brumate even with steady heat
Even in a temperature-stable indoor enclosure, many leopard geckos show a seasonal appetite dip purely from shortened natural daylight hours. This differs from the deliberate cooling breeders use to trigger breeding condition, which involves an intentional temperature drop.
What's normal during this period
Reduced appetite, more time in hides, and slightly lower activity are typical. Weight should stay roughly stable or dip only slightly — a gecko should not be visibly losing body condition.
When it's not just brumation
Noticeable weight loss, a thinning tail base, lethargy that doesn't lift with warmth, or complete food refusal for more than 3–4 weeks warrant a vet check rather than being written off as seasonal.
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A single adult leopard gecko needs a 20-gallon long tank as an absolute minimum, with a 36x18 in (40-gallon breeder) footprint now considered the recommended standard — plus a secure lid, an under-tank heater on a thermostat, a thermal gradient, at least three hides, and a shallow water dish.
Set up in this order: substrate, then heat source wired through a thermostat, then hides and water dish, then decor — and run the whole enclosure for at least 24–48 hours to confirm stable temperatures before your gecko moves in.
Hatchlings can start in a 10-gallon tank or tub, juveniles do well in 20 gallons, and adults need a 20-gallon long as an absolute minimum — with 36x18 in (40-gallon breeder) now the widely recommended standard, not just an upgrade.
Heat a leopard gecko enclosure with an under-tank heater and/or overhead heat source (halogen or deep heat projector) wired through a thermostat — a thermostat is mandatory, not optional, and heat rocks should never be used.
Leopard geckos can survive without UVB using dietary D3 supplementation, but current husbandry guidance now recommends low-level UVB (roughly 2–6% T5) as best practice — it improves D3 synthesis, bone density, and natural behavior, and views on it have shifted significantly from older nocturnal-species advice.
Keep ambient humidity around 30–40% across most of the enclosure, with a dedicated humid hide raised to roughly 70–80% to support smooth, complete sheds.