Bats are mammals. Most species of bats are among nature's must beneficial critters. They eat hoards of insects, and their droppings, called guano, is among the best fertilizers for cultivated crops. Despite their strange appearance, most bats are quite harmless to humans.
I know all that about bats, but they still freak me out to the point of panic if I have to be in an enclosed space with them. There is a brand new exhibit at the zoo called Kingdom of the Night and when I went I thought perhaps going thru that would cure me . . . it took me less than 15 seconds to step inside . . . and go directly out the other side!
On a spring or summer day I can watch them swooping around at sunset and it doesn't bother me too much . . .