Attracts: Northern Cardinals, Black-Capped Chickadees, Evening Grosbeaks, House Finches, Purple Finches, Mourning Doves and more. Birds will frequent your feeders more often & stay longer if you provide a consistent, reliable source of high-energy seeds and blends from Armstrong. Birds will frequent your feeders more often and stay longer if you provide a consistent, reliable source of high-energy seeds. Premium year-round contents: cut corn, red milo, white millet, and black oil sunflower. These ingredients are high in Vitamin E, Potassium, Iron, Protein, Calcium, Fiber and Vitamin B. Compatible with feeders with larger openings like tube feeders, hopper feeders and tray feeders.