The mountain chickadee and nuthatch are feeder friendly eaters. They will fly in and take one single sunflower seed and fly off to eat it. We therefore put out two feeders. One we put hen scratch in for the stellar Jays, and the other for the chickadees and nuthatch with sun flower seeds.
But then there are the greedy birds that flock together. Like the rose finch which come in sometimes in flocks of a couple hundred at a time. Or the gross beaks with large flocks. They will empty the feeders in a few minutes and leave poop all over the deck with all the shells. They also crowd the other birds out and keep them from feeding.
So when we see one of those flocks come in we run out to bring the sunflower feeder inside. I have watched the finches empty that feeder in less than 5 minutes. At $32.00 for a bag of sunflower seeds those guys could bankrupt us in a hurry. The hen scratch for the other feeder is one third the cost of the sunflower seeds. We love to feed the birds but when it comes to feeding gluttons who take advantage of the feed and with it being so expensive we clearly draw the line.