Why Does My Leopard Gecko Dig?
Nesting behavior
Gravid females dig with particular purpose, searching for the right spot to lay eggs — this is one of the clearest and most recognizable forms of digging and is exactly why a lay box is provided during breeding.
Seeking a microclimate
On loose or diggable substrate, a gecko may dig to reach a slightly different temperature or humidity layer than what's at the surface — a normal thermoregulation and comfort-seeking behavior.
General exploration
Especially in enrichment-rich, diggable setups, digging is simply part of a leopard gecko's natural foraging and territory-patrolling behavior and doesn't need a specific cause to be normal.
When digging signals a problem
Persistent, frantic digging concentrated at glass corners or seams — rather than in substrate — often overlaps with escape-seeking or stress behavior similar to glass-surfing, and is worth checking against temperature, hide availability, and overall husbandry.
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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.