The birds around here can empty the feeder in a few days. Nuthatches, Titmouse and the Cardinals keep the ground clean below the feeder. I also through food out on the lawn in front of the porch, we can sit out there early morning and early evening and there is 15-25 Cardinals that come in a feed. Nice to watch. I did see a Red Headed Woodpecker the other day with the Cardinals. And I feed the Squirrels peanuts. I have seen the Wrens starting to look for a nesting area this past week, along with their loud voice.