In a trio or quartet of macaws the young can be identified by their eye color. Their irises are dark, becoming yellowish with age. Their age can be a giveaway too. Even when they can fend for themselves, they often pretend to be babies. In the wild, large macaws that survive their first year have few natural predators and probably die between the ages of 30 and 45 from a combination of eagle attacks, parasites, disease, and old age.
Few birds live so long or learn so much throughout their lives.