Barred Owl in the Forest

I was running the dogs loose near the river when I heard this Barred Owl, very loud and very near. 

I went back up to the towpath and waited. Nothing. 

I was pretty sure I'd missed it, and started following a sapsucker, when the owl rose from the forest floor and roosted in a tree right up next to the trunk. 

 Owls are very hard to see, even when you know they are there; truly amazing camouflage.