Acorn Woodpecker and Northern Flicker Woodpecker competing for the same home.
I had just finished videoing the Larger Northern Flicker Woodpecker as he was pecking at the hole, then suddenly, the smaller Acorn Woodpecker flew in and pushed him away.
Didn't get all of this action on Video but I did get this photo of them playing Hide and Seek. The Northern Flicker won out in the end.