Do Birds Go Grey With Age?
Mammals’ hair eventually turns gray because as they get older, the pigments in their roots stop producing new growth. While gray hair is typically associated with aging in humans, in certain species it is a sign of maturity and a positive attribute. For instance, dominant male gorillas are referred to as silverbacks because of the distinctive grey hair that covers their backs.
Most birds in the wild will never live to an age where they would be deemed old enough to turn gray. Is this the cause of the uncommon sightings of grey birds?
Its not. Actually, researchers have found that birds’ feathers are colored by more than just pigments, which prevents them from going gray. The range of colors seen in birds is caused by light reflecting off protein in their feathers at various wavelengths. Birds can regulate the nanostructure of their feathers as they age to prevent greying and maintain their ability to recognize one another.
It’s unlikely that a bird you’ve seen that appears to be greying with patches of light-colored feathers is doing so because of advanced age. It is likely that the bird you observed is leucistic, and the reason for these anomalies in its feathers is a genetic mutation.
Birds in your inboxSign up for the latest news and updates
Gifts, bird care, books & more
However, if birds experience less noticeable greying than mammals, it could be because pigments, rather than the microscopic structure of the feathers, produce the colors in birds’ plumage by reflecting light at different wavelengths.
Indeed, a variety of birds, such as robins and jackdaws, can also turn grey. There is even evidence that greying birds are more desirable partners, possibly as a result of the significance of experience in nesting success.
It could indicate a deterioration in physical state, but it can also be a sign of dominance (consider a silverback gorilla).
FAQ
Do Robins go grey with age?
What do birds do when they get old?
What do birds look like when they get old?
Do all animals go grey with age?