In order to attract the kind of birds you want at your bird feeder, you will need to know what kind of wild bird seed each species prefers. For example, black oil sunflower seeds will attract a variety of songbirds including chickadees, finches, cardinals and grosbeaks, siskins and buntings but won’t necessarily attract orioles, tanagers and doves. Orioles and tanagers like suet and fruit, even nectar while doves and other ground feeding birds prefer corn, millet and milo. Woodpeckers, on the other hand, prefer suet.