Some types to check out that are "deserty" are Uromastyx (but need a larger tank. Also Sandfish aka sand swimmer, a small skink type that lives in the sand. The 20 gal tank will limit what you can get. Also be sure to research what they eat, water, heat, etc. Some like the Uro need it very hot 120F to bask, others can only handle around 90F. Some eat only or mostly ants which can get costly, others eat veggies, mice, some even other lizards. Find what you think you want for looks, then check temperment, environment, and diet, also what if anything else they can be housed with. Make sure you set-up the tank, then go for it and enjoy. Kenn
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**Kenn**