The pileateds are probably the largest of the North American Woodpeckers. I say "probably" because there is a slim possibility that the larger Ivory Billed Woodpecker is, in words from Monty Python's Spamalot, "not dead yet!"
You can get an idea of how large she is in the photo below of her on suet feeder. They can reach almost 20 inches in length.
I say "she" because she lacks the red moustache and forehead seen on males.
She looks rather ungainly on this suet feeder. I have seen suet feeders made specifically for woodpeckers with a vertical board located below the suet block that serves as a tail brace.
The lack of a tail brace didn't deter this bird from feeding.
We hear them in the woods behind our house with their distinctive call and slow, deep hammering. They prefer large trees in which to excavate a cavity for nesting and there are plenty of large trees in our woods.
If you double click on the photo below you can get a glimpse of her tongue sticking out. Apparently they have long barbed tongues that they use to pull ants and termites out of tunnels.