Taxonomy
The Red-shouldered Macaw (Diopsittaca nobilis, Linnaeus 1758) is a member of the monotypic genus Diopsittaca (Ridgway 1912), one of 6 genera of Central and South American macaws. There are two distinct subspecies, D. n. nobilis (Hahn's Macaw) and D. n. cumanensis (Noble Macaw), and some with longer wings might represent a poorly differentiated subspecies, D. n. longipennis, which intergrades with D. n. cumanensis in central Goiás, Brazil. Previously the Red-shouldered Macaw was included in the genus Ara.
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