No other food attracts a wider variety of birds. More than 140 different bird species have been attracted to Jim’s Birdacious® Bark Butter®. Bark Butter Bits are bite-sized nuggets made of rendered beef suet, soy oil, roasted peanuts, corn, oats and calcium carbonate. Feed alone or mix in with your favorite Wild Birds Unlimited seed blend. Attract a variety of birds, including many that do not normally visit feeders.