Fort Laramie National Historic Site is an 833-acre park that conserves and interprets historic Fort Laramie in southeastern Wyoming. The North Platte and Laramie rivers converge in the park, and the riparian forest along these rivers provides good roosting and foraging habitat for bats. The Fort grounds also attract bat species that roost in structures. To try and keep bats out of the historic buildings in the park, a special bat house was built within the grounds but away from the historic district.
The Northern Great Plains Inventory & Monitoring Network monitors bats to detect long-term trends in bat populations at the park. Six acoustic recording stations were set up at Fort Laramie National Historic Site for long-term monitoring: three in riparian forests, one at the bat house, one on the Fort grounds, and one along a canal that borders the park. Acoustic recorders detect the unique ultrasonic calls bats use for echolocation. There were 205,769 bat call recordings from stations across all survey nights from 2015–2017. The data were analyzed through specialized software programs that make preliminary identifications of the bat species based on individual call characteristics, such as frequency and shape. Some bat species make calls that are similar to other species, which is why researchers with special expertise review the calls and make the final species determinations.