Infestations
Bat bugs are moderately common in the midwest US and have been recorded from Scotland, and are found in houses and buildings that harbor bats. Infestations in human dwellings are usually introduced by bats carrying the bugs on their skin. Bat bugs usually remain in close proximity to the roosting locations of bats (attics, chimneys, etc.) but explore the rest of the building if the bats leave or are eliminated. In some cases, they move into harborages that are more typical of bedbugs, such as mattresses and bed frames.
Read more about this topic: Bat Bug