The bird feeder body includes a base with a number of perches connected thereto by a coil spring, which is tensioned and configured so that when an animal of a predetermined weight is positioned thereon, the perch will collapse to move the animal to a position that is enough below the feed aperture of the feeder body to make unwanted feeding much more difficult if not impossible for the unwanted animal. In addition, a magnet is positioned underneath the feeder base above the desired location the perch for normal feeding by a desired bird. The magnet assists in locating the perch in the correct position and helps retain it in place. Also, the magnet attraction between the magnet and the perch can be modified to help control how much weight is needed on the perch before it collapses and breaks away.
