One bold Arizona Woodpecker landed on the leg of a horse and hammered on it as if it was a tree. It came back for another rap after the horse moved off, and caused the horse to plunge and kick to keep it away.
The Arizona Woodpecker was considered the same species as the Strickland's Woodpecker of southern Mexico. Current thinking is that they are similar, but separate, species.
Reports of Arizona Woodpeckers traveling in large social groups, like its cooperatively breeding relative the Red-cockaded Woodpecker were inaccurate. The Arizona Woodpecker is not social. A pair with their three offspring is the largest group that has been observed.