I was beginning to think the birds had all moved to a new neighborhood. I'd only seen one at the feeder since I put it up last Sat. It's a 3-part feeder. I have generic 'birdseed' in the top and bottom, and black oil sunflower seeds in the middle. Don't ya know, I came home today, and the middle section is half empty. (Other sections appear untouched.) I really hope the cardinals have found it, but I probably won't be able to watch it until the weekend.