Help

A bird is visiting my yard One that I have never seen before Eating from the ground so vigorously Pecking like a Sandpiper or a Woodpecker That pecks on a tree Looks like a Woodpecker But not exactly and there are really four I suppose there could be more He has the ladder back On his back, and a long strong thick beak A red spot below his head On the top of his back its said His upper chest or top of the breast A half moon as dark as night Accented on the bottom half by mostly white He works and works pecking the ground Why he almost wears me down Now he's joined by a goldfinch Of such a brilliant hue A male Bluebird eats undistrubed too When the mystery bird takes To flight on his tail there is a spot of white I could watch him all the day But responsibility calls me away (My daughter said her husband said that it is a Northern Flicker and I looked it up and the pictures of the Northern Flicker match what I am seeing.)