“Pileated” means “having a crest on the pileum”. A “pileum” is “the top of the head of a bird, from the base of the bill to the nape” (Merriam-Webster). So now you know why this bird is named “pileated woodpecker”.
I was crunching along through the snow and ice when I heard a tapping sound. Looking up, I noticed little woodchips floating down to the towpath ahead of me. I stood there for ten minutes watching and listening (and photographing; I really need a better lens for long distance shots).