animals are very instinctive,, if he wants you,, you need to take him home.
and always be glad when animals want to live near you,, they seek out clean areas..... except rats..you dont want rats,, their dry poop could really do you harm.
as a kid on the farm,, toads,, bugs etc,, farmers always want to know when deformed frogs appear,, their bodies are something like 1 level more sensitive than ours to the environment. (i wouldnt doubt lizards are the same--we have lots of lizards here in texas,, and yes my husband has some questionable nick names for them