This is Merle…the squirrel.  Merle is old, and tough, and scrappy.  He kind of rules the backyard so I felt he should get his due here…even though he’s not a bird.  I think Merle is blind in his right eye, or at the very least has a cataract.  But he seems to do fine overall.  Some younger squirrels do some daredevil stuff to get to the bird seed…like fly 7 feet horizontally through the air to grab on to a feeder.  Others will go up in trees and climb down these very small, thin branches…and then try to drop down on the feeder from about 10 feet above them.  Its a hit or miss proposition.  But Merle doesn’t mess with any of that nonsense.  He seems fat enough to be successful in his approach.