10/08/2026
Bristol Township EAC & Bird Town is back after a hiatus full of behind the scenes work, and they are kicking off their return by celebrating Bat Appreciation Month alongside the Pennsylvania Bat Conservation and Rehabilitation team. Today the spotlight is on the tricolored bat, known scientifically as Perimyotis subflavus. (PER-ee-MY-oh-tiss sub-FLAY-vus)
This tiny creature weighs just a quarter of an ounce fully grown, with a body length under three and a half inches and a wingspan reaching up to ten inches. Its fur features dark gray and tan bands with yellowish brown tips, while its overall body shade ranges from pale yellow, orange, gray or brown. Underneath, its belly is lighter, contrasting with dark brown wing membranes supported by pink or red orange forearms and wing bones.
Tricolored bats make their homes near open woodlands, forest edges, and wetlands. During summer months, they roost high up in tree foliage and rock crevices. As autumn arrives and temperatures drop, they enter a state of torpor through spring, hunkering down in cool, humid caves and abandoned mines. This species dines on small, soft bodied insects.
Life begins for these bats following mating between August and October, though females delay egg fertilization until spring. After a gestation period of 44-60 days, mothers give birth to two pups. These young bats learn to fly within a month, gain their independence just a week later, and can go on to live anywhere from 4-15 years in the wild.
Their population has been in massive decline due to a deadly fungal disease known as White Nose Syndrome. The decline has led Pennsylvania to list the species as state endangered in 2019, with federal authorities proposing endangered status as well.
Visit Pennsylvania Bat Conservation & Rehabilitation at https://pabatrehab.org/
Visit the Bristol Township EAC at https://www.bristoltwppa.gov/343/Environmental-Advisory-Committee-EAC and check out the helpful Quick Links!
Visit the PA Game Commission at https://www.pa.gov/agencies/pgc/wildlife/discover-pa-wildlife for more information on this species.
Published October 7, 2026 by the Bristol Township Environmental Advisory Committee, with consultation by Thrive Pediatric Behavioral Health, LLC.
Photo Credit: J. Scott Altenbach