well im googling it and did the ask jeeves thing but not much help....there are 9 species of bats in Michigan....but I have never seen one sitting still so cant identify what kind it is. It does say that all 9 species eat insects

and that ALL bats can HAVE rabies but do not carry it, they die from them. Not sure if this is making me feel better or not. The bats in my yard are not huge, but not small either. Hubby says wing span is about 10-12 inches YICK I don't hate them but I would feel better knowing what kind they are and if they even bite small animals.