There are 10 subspecies of the Eclectus Parrot:
Eclectus roratus roratus - (Grand Eclectus) southern Moluccas
Eclectus roratus vosmaeri - northern and central Moluccas
Eclectus roratus westermani - known only among aviary specimens
Eclectus roratus cornelia - Sumba and Lesser Sumba Is.
Eclectus roratus riedeli - Tanimbar Is.
Eclectus roratus polychloros - (Red-sided Eclectus); New Guinea and Indonesia
Eclectus roratus biak - Biak Is.
Eclectus roratus aruensis - Aru Is.
Eclectus roratus macgillivrayi - Cape York Peninsula, Australia
Eclectus roratus solomonensis - Admiralty Is., Bismarck Archipelago, & Solomon Is.
The color of the Eclectus varies by subspecies, and is most obvious in females. The Eclectus is known as the most color dimorphic parrot in the world. The females are a vivid red, and the males are usually a shade of green. The various subspecies have differences in size and color variations in wing feathers, feathers around the eye, etc. Because of the range of sexual dimorphism, it was once believed that males and females were two different species. The Eclectus Parrots were once kept and considered gifts from the gods in early Egypt because of their beautiful feathers.
The female is generally the more dominant and may temporarily show signs of aggression upon reaching puberty, usually around 18-24 months of age. She may also be aggressive toward an intended mate.