Check out this great item that I found online.
Bat Talk and Walk with Cullen Geiselman
Bat expert Cullen K. Geiselman, PhD, will share her extensive knowledge of the world's bat species, their habitats, and life histories. Afterwards join her on a twilight ‘bat walk' at Edith L. Moore Nature Sanctuary or another location of your choice to spotlight bats using an ultrasonic bat detector. Alternatively, you may prefer to visit Waugh Street Bridge over Buffalo Bayou, to see 250,000 Mexican free-tailed bats emerge at dusk. For up to 20 people.
Generously donated by Cullen K. Geiselman, PhD.
Click here for more on the Bat Talk and Walk
"Bat Talk and Walk with Cullen Geiselman"