A little haunting, this is the sound of perhaps the world's rarest bird, a female Stresemann's Bristlefront spotted last week in Brazil. We won't give up searching, but as of now, she is the last-known of her kind. (Recording by @biodiversitas) https://t.co/HLph5OVH2j pic.twitter.com/sgzUFDIP2H

— American Bird Conservancy (@ABCbirds) December 24, 2018