How do cranes use their red crowns?

Photo Eva Szyszkoski, International Crane Foundation

This is a close look at crane #105's red crown. Every adult Whooping crane has a red crown by the time it is a year old. The crown is actually a bald patch (no feathers). A crane can change the color from pale to blazing red. How could this be useful?

Think... then link

Journey North is pleased to feature this educational adventure made possible by the
Whooping Crane Eastern Partnership.