Many prefer the flashier male of the species, and I admit those bold red feathers are hard to ignore. However, I think the ladies have a subtler, more refined beauty in their paler, dusky cloaks.
While the human voicebox can produce only one sound at a time, a bird’s syrinx is a paired structure that allows birds to sing complex, fast-paced songs. Located where the bronchial tubes from each lung come together, both sides are equally capable of producing sound. They can be used in concert to sing two different notes simultaneously and to complete broad sweeps in pitch quickly.