Due to frigid temperatures, birds need to consume more food on a daily basis in winter. They have little body fat to store the energy they need to keep warm and move about. And when the temperatures plummet into the single digits and below they are often only 36 hours from starvation. A high fat diet is what provides the energy in the form of calories to keep warm in the winter. Birds have a poor sense of smell so they locate food by sight and they can identify which seeds contain the highest fat content. So what is it birds need?