Northern Flickers are easy to identify by their brown coloration and yellow under the wings.
Although facing away from the camera, this Red-bellied Woodpecker is fairly easy to identify. The "zebra" pattern on the back is distinctive.
Even though this photo is blurry, it is still possible to tell that the beak on this bird is quite long, separating this Hairy Woodpecker from the similar Downy Woodpecker. Listening for the call note can be important when separating these two species in flight.