Distances seen between roosts and other habitat features may be influenced by the age, sex, and reproductive condition of these bats. Distances between roosts and paved roads is greater than the distances between roosts and unpaved roads in some locales, although overlap between the two situations has been documented. In Illinois, most roosts used by adult females and juveniles were about 2,300 feet (700 m) or more from a paved highway, while adult males roosted less than 790 feet (240 m) from the road. In Michigan, roosts were only slightly closer to paved roads: 2,000 feet (600 m) on average for all roosts located. In general, roosts were located 1,600 feet (500 m) to 2,600 feet (800 m) from unpaved roads in Illinois and Michigan. Roost trees used during autumn in Kentucky were very close to unpaved roads at an average of 160 feet (50 m).