Down feathers for birds are like there Heating and AC in your house. If there to cold they will fluff up their feather and allow air to come in and get trapped and warmed. Too warm they will stay sleek and create cool air by flapping there wings or taking a bath.
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It is on the wing of the bird. To look at it on a chick just starting to grow feathers, gently hold the chick in one hand and spread the wing out. Take note if the tips of the feathers are even or jagged. That is referred to as "the feather line" On an adult bird it is more easily seen but harder to control the bird.
Down feathers help insulate the body of a bird.
All birds have down feathers, which keep them warm.
a bird flew by
a bird flew by
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
I think it was Downy (Down being the soft feathers on a bird)
It anchors down the bird's flight muscles.
Yes, the extra water weight weighs the bird down in flight.
Sleeping bags are made of synthetic or cotton or wool or down (bird's under layer of feather) materials.
The term pillows down means the type of material they use for the filling of the pillow. Down is a type of feather that is found on the bottom layers of bird feathers.
small feathers that cover the body of a bird and are not used so much for flight.