Bat bugs are parasites that live and feed on native bats in Minnesota. Similar to the way that fleas live and feed on dogs. Bat bugs are very similar to bed bugs and it takes a very trained eye and a microscope to tell them apart. We typically find bat bugs in attics and other areas where large colonies of bats reside. Often bat bugs will start to be noticed once bat colonies have moves out and the bat bugs are looking for new hosts elsewhere.