Voilà la fiche du World Parrot Trust.. C'est en anglais, mais on y dit clairement que l'espece inclut 3 sous especes, dont le nobilis (noble) et le cumanensis (hahns).
http://www.parrots.org/index.php/encycl ... red_macaw/
Races including nominate:
three: D.n. nobilis, D.n. cumanensis, D.n. longipennis
Colourization Adult: D.n. nobilis: both adults in general yellow/green; blue forehead and forecrown; red bend of wing, carpal edge and lesser underwing coverts. Bill dark grey. Face bare and white. Eye dark orange. D.n. cumanensis: both adults larger than nobilis, larger bill with horn coloured upper mandible. D.n. longipennis: both adults as in cumanensis, but larger in size.