Curl-crested Manucode Unusual Anatomy
At first look, manucodes appear almost normal compared to other birds-of-paradise. Males and females look alike, live in pairs, and males help raise the young. But on the inside manucodes have an exotic secret, and you can hear it in their voices. Males have a greatly lengthened windpipe that works like a wind instrument, creating a long, mellow, fluting song.