Reptile Enclosure Hazards
Five enclosure hazards come up across nearly every species kept. None of them is exotic, all of them are documented, and each is worth checking against a setup that already looks finished. Our species enclosure pages link here rather than repeating this on all 68.
Thermal burns from the heat source
Burns from contact with a bulb are among the most common reptile injuries seen. Heat rocks are singled out repeatedly because they heat unevenly, and snakes will coil around them. Use thermostat-controlled heating, and guard or screen bulbs and ceramic emitters so the animal cannot touch them.
UVB that never reaches the animal
Glass and most transparent plastics filter out UVB, so a bulb mounted outside a glass lid is doing very little. UVB output also falls over time: bulbs need replacing every 6 to 12 months even while they still produce visible light.
Cutting ventilation to hold humidity
This is the standard fix keepers reach for, and the Merck Veterinary Manual specifically advises against it: reducing ventilation to maintain temperature and humidity frequently causes skin and respiratory disease. Raise humidity with substrate, water and enclosure design, not by sealing the box.
Unsecured decor
Heavy hides, rocks and branches that are not stable can shift and crush an animal, particularly one that burrows or climbs. Anything stacked should be secured to the base rather than balanced.
Trusting the bulb wattage instead of a thermometer
Actual enclosure temperature depends on room temperature, ventilation and distance, not on the number printed on the bulb. Measure at the basking surface with a probe or infrared thermometer, and put every heat source on a thermostat.
Common questions
What is the most common reptile enclosure injury?
Thermal burns from contact with a heat source are among the most commonly seen reptile injuries. Heat rocks come up repeatedly because they heat unevenly, and snakes will coil around them rather than moving away.
Does UVB pass through glass?
No. Glass and most transparent plastics filter UVB out, so a bulb mounted outside a glass lid is doing very little. UVB output also falls over time, and bulbs need replacing every 6 to 12 months even while they still produce visible light.
Can I block ventilation to raise humidity?
It is specifically advised against. The Merck Veterinary Manual states that reducing ventilation to maintain temperature and humidity frequently causes skin and respiratory disease. Raise humidity through substrate, water and enclosure design instead.
Is a bulb's wattage enough to know the temperature?
No. Actual enclosure temperature depends on room temperature, ventilation and distance from the bulb, not the number printed on it. Measure at the basking surface with a probe or infrared thermometer, and put every heat source on a thermostat.