A flicker is a bird native to north america. It's true name is a yellow shafted flicker. Those are the ones in PA.
Yellow-shafted flickers are only one kind of flicker. There are also red-shafted flickers.
To make it more simple, Kris777, a flicker is a relative of the woodpecker. They look very similar to the larger types of woodpeckers, and if you ever saw one, you'r first impression would be "Look, a woodpecker."
My poem is referring to the yellow-shafted flicker. When yellow-shafted flickers are perched, they look pretty normal. But when they fly, it reveals bright yellow on the underside of their wings and tail. It's quite pretty.