To keep squirrels out of your bird feeders you can hang the feeder using strong mono-filament line from a limb which is 6 feet off the ground. You must be sure to keep the feeder 6 feet from the trunk of the tree as well as 6 feet from any other branches. The squirrels can not hold onto the fishing line to get to the feeder & they (almost always) can't jump the distance to the feeder.