Your Bird Oasis provides a large selection of bird food, but where should you start? What bird seed is best for cardinals? What type of bird food should you use to attract goldfinches? Don’t worry, we’ll help you wade through the variety of bird seed and equip you with the seed you need. As a general rule you cannot go wrong if you fill your bird feeders with sunflower and small millet seeds. In addition, Niger (tiny, skinny black seed) will likely attract every finch in the area! Safflower seeds will likely attract your neighborhood cardinals. A birdfeeder full with grass seed will attract juncos and sparrows.