How old is a bird in human and bird years?

Answer 1

It depends on the bird and its age. You're probably looking for a simple answer, but there isn't any simple correct answer.

Some of the longest lived birds such as large parrots or albatrosses may live as long as people (at least in captivity - in the wild they tend to get eaten when they get older and slower). You might therefore think one human year would be equivalent to one macaw year, but it's not that simple. A macaw grows to full size in less than a year, but isn't fully sexually mature until three or four years. That doesn't correspond to humans at all - we tend to reach full size and sexual maturity about the same time. Still, a macaw's first four years are each equivalent to perhaps 5 human years. After that, a year for them is like a year for us.

On the other hand, your common wrens, hummingbirds, or warblers live for only maybe 5 years. Each year of their life would be like 15 of ours.

Ducks, geese, hawks and eagles can live over 20 years in the wild, so they're somewhere in between. Their first two years might be like 7-8 human years. After that, each year for them might be like two for us.