Wholesale Country Blends Black Oil Sunflower Seeds Country Blends Sunflower Seeds. These black oil sunflower seeds are 100% natural, high quality seed designed to attract many different species of colorful birds to your feeder. Especially made to attract house finch, gold finch, purple finch, cardinal, chickadee, evening grosbeak, mourning dove, tufted titmouse and white-throated sparrow. packaged in printed barrier plastic bags, so seed stays bug-free. 3.5 lb per package,6 per case.