A large, long-tailed bird of lowland, open wooded areas, including mangroves. All black with red eyes and iridescence on the wings, back and tail. Some spotted iridescence on neck and chest. It has quite long-necked appearance. Co-occurs with Jobi and Trumpet Manucodes, but Glossy is larger and longer-tailed. Voice, an unpleasant, high-pitch whistle sounding a bit like microphone distortion. Sings from a high, open perch.