Also, the ideal mix has a high sunflower seed content. Almost all birds will eat sunflower seeds . Sunflower seeds are highly preferred by chickadees, finches, grosbeaks, sparrows, wrens, titmice, and woodpeckers. These seeds are best served in a tubular or funnel shaped feeder. If the feeders have a wide ledge, cardinals and grosbeaks can be more easily accommodated.
Goldfinches prefer their sunflower seeds hulled.
Millet seeds attract song sparrows, white-throated sparrows, chickadees, and juncos. This food may be offered in a hopper or funnel-shaped feeder. Milo, a grain also called sorghum, is a round, red seed about twice the size of millet. It is added to birdseed as a bulking agent as well as to reduce the cost. It has a thick coating and a low fat content.