This is commonly found in an ordinary house, buildings or trees in the Philippines. My husband was so scared of it when he stayed at the "fish pond" as he calls it (although it's a cottage for us, LOL). Anyway, it's not that scary as you thought, they are actually flesh-eating lizards. They help eliminate some insects and mosquitoes. They don't sound good though and when they get bigger, they don't look good either, haha! Oh, okay... they look soo scary then.