Ibis, the globe cage feeder in the foreground of this picture actually excludes the squirrels pretty well, too. It also only admits the little birds although the male cardinal gets in there regularly. He must be slimmer than the female because she doesn't make the attempt. I'm pretty happy that the blue jays, grackles and doves can't chase off the little birds now. It's available on gardeners.com
I must qualify the above statement by saying I did look out the window (it is right beside my desk here) and saw a squirrel had actually removed the lid on the feeder and was head-down in the seed tube. They are SO clever and determined! Darn it, I was too slow to get a picture of him, but will keep my eyes open.
There is a red-bellied woodpecker on the tall green feeder in this picture, too btw.
