Inmates at the Windsor prison are helping to save bats by building daytime roosting boxes.
The 50 bat houses were given away at this year's Herrick's Cove Wildlife Festival to attendees who regularly observe bats near their home.
Corrections staff member Paul Brosseau says the project educated the inmates about the problems Vermont's bat populations are facing. An additional 150 more houses are being built.
The materials for the program were donated by the Windsor Coon Hunters Association.
Vermont's six cave-bat species began disappearing in 2008 from white-nose syndrome, a fungal disease that has rapidly spread to virtually all of the state's bat caves.
The bat houses are an alternative site where bats can roost during the daytime.