Downy Woodpecker
Dryobates pubescens)

f4 @ 1/2500s, ISO:2500, Nikon D3S w 500mm

"Downy Woodpecker," Wikipedia, the free encyclopedia. The downy woodpecker is virtually identical in plumage pattern to the much larger hairy woodpecker, but it can be distinguished from the hairy by the presence of black spots on its white tail feathers and the length of its bill. The downy woodpecker's bill is shorter than its head, whereas the hairy woodpecker's bill is approximately equal to head length.
Anchor Point, Alaska