As we know, Acorn Woodpeckers - (Melanerpes formicivorus), can be very loud with their vocalizations, which caused me to look up. In the first photo, a territorial dispute is in progress between two Acorn Woodpeckers, while another watches from below. In the second photo, I believe one Acorn Woodpecker dived bombed another while being upside-down, and to the side of the other, as one bird is back side up, and the other is belly side up. At first I didn't know what I was looking at in the second photo. What do you see?