Cave-roosting species may have a longer lifespan than non-roosting species because of the decreased predation in caves. All five of the most important bat hibernacula are now closed to public access to protect the few surviving bats from disturbance. If you had one bat of each species that were both the same age the Big Brown bat would be significantly larger. Select a name for a species profile from the NH Wildlife Action Plan or other information about the species. Once a bat colony is evicted from a building, any parasites that remain behind may move around the attic (and possibly the house) in search of bats. This colonial vs. solitary distinction may vary with season. However, reports of these bedbugs biting humans or domestic animals are rare. I have found that the the wingspan of adult Big Brown bats in Massachusetts is between 11-13 inches. Bats may also form colonies in trees or roost solitarily in attics. Bat species that give birth to multiple pups generally have a shorter lifespan than species that give birth to only a single pup. The picture above is a Big Brown bat. This guide also features a key to identifying the nine bat species in Massachusetts. A male Brandt's bat was recaptured in the wild after 41 years, making it the oldest known bat. The Little Brown Bat was once the most abundant bat species in Massachusetts, but its population declined by more than 99% after the onset of WNS. Common tree bats include the red bat, silver-haired bat, and hoary bat. All are "of conservation concern." The Massachusetts Homeowner's Guide to Bats has information and advice on how to evict and relocate bats, plus tips on handling a bat, designs for one-way doors, and bat house plans.
A species of bedbug, which resembles the species that feeds on humans, lives on the bats and in their roosts.

Eastern red bat ; Silver-haired bat; Northern long-eared bat (federally threatened and state endangered) Tricolored bat (state endangered) Hoary bat
New Hampshire is home to 8 species of bats. Typically solitary species females may group during the summer in maternity colonies but remain solitary during hibernation.