For centuries, flamingos were recognised by their vivid pink feathers, yet the reason behind that striking colour remained uncertain. Early naturalists could describe what they saw, but they could not explain why young flamingos emerged from the nest in muted shades before gradually becoming brighter as they matured.

Flamingos hatch in a dull gray color, not pink. Their vibrant pink feathers develop from pigments found in their food. Algae and crustaceans contain beta-carotene, which the birds…

For centuries, flamingos were recognised by their vivid pink feathers, yet the reason behind that striking colour remained uncertain. Early naturalists could describe what they…