Leave them in full sunlight for about three hours. Use small stones for paperweights. The black piece absorbs the heat, the white reflects. Some animals are specially adapted to life in a winter environment. In the cold winter, animals need heavy winter coats, so many grow extra fur or feathers.
Some animals change the color of their coats from brown to white to blend in with the snow.
Ermines lose and replace each brown hair with a white hair. A snowshoe hare changes only the tips of its hair, and its feet remain white year round. As the days grow shorter and the temperature falls, hormonal changes in these animals cause color changes. Some animals burrow under the snow to avoid cold a few birds even create winter bedrooms by plunging into a soft snowbank. Watching wildlife is an exciting winter activity.