Mini Poly Bird FeederMini Poly Bird Feeder The Mini Poly Bird Feeder is a great addition to any wild bird enthusiast's collection. Constructed with durable poly carbonate, this hopper style feeder is designed to attract a variety of birds while lasting for years. Perfect for a variety of bird seed mixes including black oil sunflower seed, safflower seed, millet, and many others. It's the perfect size to accommodate all your a wide selection of birds including cardinals,