Origin, distribution, and insertion of the brachial plexus nerves in Blue-and-yellow Macaws (Ara ararauna, Linnaeus, 1758)

Brazil has about 80 species of parrots cataloged, and five of them are identified as Macaws. As the vast majority of birds, Macaws use flight as their primary means of locomotion. However, the strength and power generated during the cycle of beating wings require a mechanism of active neuromuscular...

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