The summer birds have all departed for southern climes or lower altitudes. Many of our human friends have done likewise. Those of us who remain are simmering soup, digging out winter clothes and making sure our homes are snug and warm. The birds who hang around all winter have the same needs—high energy food, winter clothes and snug, warm homes.
We can’t help much with the wardrobe—birds already have down jackets! When they get cold, they simply puff up their feathers, trapping warm air against their bodies. This works remarkably well—until the wind kicks in. And we have a lot of wind.