Piotr Naskrecki got an interesting photo of an unusual fly. "You think you have problems? Imagine that you have to live with a chicken-sized, blood-sucking parasite attached to your head. This poor Miniopterus bat that we caught during the biodiversity survey of Gorongosa National Park has to endure living with a wingless fly Penicillidia, which never leaves its body and loves to hang out on the top of its head."
More on the various families of bat-sucking flies