1. Greater sage-grouse
This weird-looking bird is a male sage-grouse. His chest is adorned with large air sacs, which he uses to attract females by making them produce odd popping sounds. The males congregate in groups across the shrubland of western North America called “leks,” calling to females.
However, these fantastically bizarre birds are decreasing in number. One species is near-threatened, while the other is endangered and has only 1,700 adult birds left. Human use of their habitat has shrunk their population.