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Bird's Voiceboxes

Birds' voiceboxes are odd ducks. Birds' voiceboxes are in their chests instead of their throats like mammals and reptiles. Scientists aren't sure how or why birds evolved these unique voiceboxes, but a new study sheds some light on how they came about. Similarities in the windpipes of birds, crocodiles, cats, mice, and salamanders suggest that birds' weird voiceboxes might have arisen from a windpipe reinforcement. From this, scientists can learn about the sounds bird ancestors -- dinosaurs -- made. Source 6x.

Bird's Voiceboxes

I feel bird's voiceboxes should be expanded ASAP to understand bird's voiceboxes thoroughly to get the facts.