Hi Tweets:
I purchased a black cylinder from Ace Hardware designed by the National Audubon Society as a squirrel barrier for bird feeders. This thing works. We have been battling with squirrels at our feeder for years. Since I installed the cylinder over a week ago, we have not seen a squirrel hanging upside down by his feet gorging himself with black oil sunflower seeds since. Thank you Audubon.
Nancy
Renton, WA.