But he's found a food supply that the other guys haven't taken advantage of yet. Also, maybe it's getting a bit colder where you live this time of year. Remember, house geckos, which include mediterranean geckos, Asian flat-tailed geckos, and common house gex are quite harmless little fellows who only come out at night. What's interesting is that the males of some species chirp! Bet you didn't think any lizards had voices.