How Feathers Insulate

How do birds stay warm when it's so cold?

Rock Rapids Utilities - #DidYouKnow to create insulation, birds fluff up their feathers and create their own little air pockets in between them. In a very short time, the air warms and

Taking the High Ground on Down Insulation - Powder

Bald Eagle Soaring above Whirlpool State Park

RE: Working Biomimicry Architecture in Transformation

How Can Down Warm You Up?

Home, Sweet Home: Bluebirds in the Neighbor-woods - Shasta Birding Society

Tufted Titmouse (Baeolophus bicolor)

Down and Feather — Downmark®

A New Way To Insulate Your House: Chicken Feathers