Mine empty a two foot feeder full of sunflower hearts every day and a sixteen inch nut feeder in two days. We have in order of greatest numbers, Blue tits, Great tits, Gold Finches, Chaffinches, Green Finches, House Sparrows, Dunnocks, Coal tits, Marsh tits, Siskins, Nut Hatch and Great Spotted Woodpecker. Occasionally we get groups of Long Tail Tits, we have Wag Tails(Pied) on the floor with our resident Doves of various X breeds. We also get, which I have never seen on any other feeders Reed Buntings, just a pair but they have come for the last two years. I have also seen recently a Bramblin