I know Robyn doesn't measure the humidity in their setups, and there's a good reason for that. You don't need to. You can easily judge how much humidity is too much and whatnot. You just don't want it to be a rainforest basically...well, that's a little extreme, but here's what I've noticed. Usually the actual open part of the tank is only humid after you add water to the soil. After about a day with the heat lamps and everything, the higher humidity levels are usually reserved to the burrows/humidity shelters.



True, uromastyx come from a desert climate where the humidity above ground is very low, but they spend most of their time underground where it's much higher. When you live in a desert that reaches such high temperatures, you need to retain as much moisture as possible or else you'll shrivel up and die. In captivity, it's not as important that uromastyx have the heightened humidity because the high water content of their foods make up for what is lost, but it's still definately a good idea to give them somewhere to retreat to that's dark, moist, and diggable.

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