A Bird's wing and tail feathers form the shape of an aerodynamic lifting force that can be changed to change flight characteristics. The body feathers provide a low drag body shape.
urm.
They have a Streamline shape, wings ,feathers and hollow bones.
Down feathers are used to give the birds body shape. Also they have a "soft" flexible bone.
structures made of keratin that are unique to birds and provide them with a warm, lightweight body covering and a streamlined shape
All birds have a body covering of feathers. It is sometimes referred to as the bird's plumage.These feathers may be different in structure, depending on the species, but having a body covering of feathers is one of the defining characteristics of birds.
contour
All owls are covered with feathers of different colors.
Highly colourful feathers
As a grouse is a bird, it has a body covering of feathers. All birds have a body covering of feathers.
Definition: The outer layer of feathers that cover a bird's body, wings, and tail and give the bird its characteristic appearance. Contour feathers differ from other body feathers (such as down and semiplumes) in that they consist of two vanes along a shaft that have interlocking barbs that give strenght and structure to the feather shape
contour feathers