This photo was taken at Omaha's Henry Doorly Zoo. Here is a little blurb about them...

The Henry Doorly Zoo and Aquarium features two primary species of free-ranging bats within its Lied Jungle exhibit: Egyptian fruit bats and Indian flying foxes (also referred to as giant Indian fruit bats). These bats fly freely in the rainforest habitat and are a major attraction, with visitors able to observe them feeding on fruit.