America’s rarest bat, the endangered Florida bonneted bat (Eumops floridanus), was once relatively common. It often lived in tile roofs of Coral Gables and Miami, and its loud, low-frequency echolocation calls made it easy to detect. The species declined sharply in the 1950’s and early 1960’s, and by the late 1970’s extinction was feared. Then in 1978 woodcutters found a male and seven females in a woodpecker cavity. Soon several more were found living in a backyard bat house.