Attract more birds to your yard with bird seed and food from D&L Farm and Home - Denton! As winter approaches, many birds change some of their eating habits. Birds that usually eat insects may start to eat berries to supplement their diets. Birds will start to look for reliable sources of food for wintertime survival. And, in the fall, many birds began forming flocks. Flocks of birds are better able to find food and protect themselves from predators. To keep up their high metabolic rate, most backyard birds eat rich, energy foods such as seeds, insects and suet. There are some times, however, when birds are not prepared to deal with sudden drops in temperature or sudden winter storms. At times like these, it is especially helpful to have feeders full so that birds can find food easily.