The normal size of a clutch is two. Incubation is about 26 days. Life span is 80 years. They are strong fliers and on long flights they fly high with slow, deliberate wing beats interspersed with brief periods of gliding. There are 10 subspecies with a west to east decline in size.
Speculation is that they are more timid because of their showy red plumage.
Parrots of the World, 2nd edition, T.H. F. Publications, Neptune, NJ, p.204.