What physical characteristic of the Whooping Crane is only visible when the bird is in flight?

Answer

Black wingtips

The Whooping Crane possesses several immediately recognizable features, such as its stunning white plumage, black legs, and the patch of bare red skin on its head. However, one specific characteristic is hidden unless the bird is airborne. These magnificent birds have black feathers on their wings that only become visible when they spread their wings for flight. This detail is part of their overall distinct physical presentation that aids in identification.

What physical characteristic of the Whooping Crane is only visible when the bird is in flight?
speciesbirdanimalevolutionCrane