Male colour polymorphism may be indicative of behavioural differences.

However, emerging and traditional middle powers can be distinguished in terms of their mutually-influencing constitutive and behavioural differences.

Historically, it has been treated as a subspecies of the lesser vasa parrot, although it shows morphological, ecological and behavioural differences.

A further spreading of hybrids might hasten the process of interbreeding by reducing behavioural differences.

However, the two species are easily distinguished through examination of life history, ovipositor and behavioural differences.