Birds are high energy creatures that require diverse diets. They like to eat a wide variety of foods including fruits, nuts, insects and flowers. As much as they love supplemental feeding, this forms a small part of their diet so you donâ€™t need to worry that the birds will become dependant on your feeder for their survival. However, if you feed the birds during the summer months donâ€™t suddenly stop in the winter. They will have become used to finding a food supply in your garden and they will appreciate your feeder much more through the cold, fruitless winter months.