???Blends heavy in black-oil sunflower seeds, safflower seeds and niger [thistle] seeds are best for attracting the songbirds most people like to watch,??? he said. ???With them, you???ll get birds such as cardinals, titmice, goldfinches, purple finches, chickadees and nuthatches.??? The bottom line, Urian added, is to increase feeder use by ???good??? birds and reduce use by ???bad??? birds.