Birds will survive the winter if they become acclimated and can find enough to eat. They build up a fat layer that provides insulation against the cold. During the winter, provide Kaytee black-oil sunflower seeds and the woodpeckers and nuthatches will gather throughout the day. Kaytee suet attracts a wide variety of species and nyjer seed will attract the finches in crowds. Wild birds can survive very low temperatures if given enough food to maintain their body fat.