This is the only known photographic documentation of the Imperial woodpecker, a 2-foot-tall relation of the Ivory-billed woodpecker. Found in a mountain range in Mexico, the Imperial is highly endangered, if not extinct. William Rhein, a dentist and amateur ornithologist who captured the bird on film in the 50s, wasn't pleased with the footage, and never publicly released the film. Tim Gallagher, editor-in-chief of Living Bird magazine, describes how the film was found and how it inspired Gallagher to pay a visit to the very same area a half century later.