Guacamayo Ambiguo vs Aratinga de Finsch

The Great Green Macaw and the Crimson-fronted Parakeet can be distinguished primarily by size and coloration. The Great Green Macaw is much larger with a predominantly green plumage, while the Crimson-fronted Parakeet is smaller and features a distinctive red forehead.

Check size first: The Great Green Macaw is much larger. Look for the red forehead: Only the Crimson-fronted Parakeet has this feature. Observe overall coloration: The Great Green Macaw is more uniformly green with blue accents.

The Great Green Macaw is significantly larger than the Crimson-fronted Parakeet.

The Great Green Macaw has a predominantly green plumage with some blue on the wings and tail, whereas the Crimson-fronted Parakeet has a green body with a red forehead and red on the shoulders.