Evolution of the syrinx of Apodiformes, including the vocal-learning Trochilidae (Aves: Strisores)
{{output}}
The vocal organ of birds, the syrinx, represents a key innovation in the evolutionary history of vertebrate communication. Three major avian clades: passerines, parrots, and hummingbirds, independently acquired both specialized syringeal structures and vocal-p... ...
