Bird food sunflower is any sunflower used in the birds feeding industry. It may be a small confection sunflower a striped sunflower or a black sunflower. Even though it depends on the coloring and the specs of each mix manufacturer, the most used ones are the small confection and the striped. Within the striped sunflowers, you may find black with white stripes, white with black stripes and grey striped.Sizes may also differ. The range goes from 4,5 ] mm wide, to 7 mm in certain varieties. All of them are considered oil sunflowers, with a percentage of oil above 42% For this same reason, manufacturers include this high energy seeds when they are preparing parrots mixes (a delicious treat for them) and to feed some species of wild birds during winter time.