they are everywhere at my parents' house!!! They chirp, almost like little birds. This one was hiding under a shoe when I was there this weekend. I wish I had something next to it to relate it to for size...b/c it's tiny! There are all sizes of them, but some are so small you can't even see them - they appear clear!! It took my parents' dog a while to get used to them b/c in the beginning she would bark all night up at the ceiling of the patio b/c they were climbing around on it!!!