No, not all birds sing. One of our focal species, the Cedar Waxwing, doesn’t have a recognizable “song”. A reason the Cedar Waxwing does not produce a song is because they are not a territorial species. They don’t need to announce to other birds that the surrounding territory is theirs. However, the Cedar Waxwing isn’t mute! It produces simpler vocalizations (sounds) known as “calls” that are thought to be used during flocking, nest building, courtship feeding, and even by nestlings (young birds).