I'm not sure if this is a variety of gecko or a kind of anole lizard. Whatever he is, he loves to climb my window screens! Houses in Hawaii are not airtight at all - no need for them to be due to the climate here. That means it's pretty easy for these guys to get into your house (or at least MY house anyway!). They used to freak me out a little, but now I don't even really care when I see one inside. They do eat bugs, so at least they are useful in that way.