The Armstrong Wild Bird Food Royal Jubilee Jay's Suet Cake is formulated with a high concentration of tallow and high-quality ingredients including rendered beef fat, white millet, cut corn, black oil sunflower, peanut meal and striped sunflower to attract: Blue Jays, Steller’s Jays, Gray Jay/Canada Jays. Birds will frequent your feeders more often and stay longer if you provide a consistent, reliable source of high-energy blends from Armstrong.