I've seen small birds drive away an owl before, and I think that's what is happening here between a songbird & a Barn Owl. It's astonishing to witness the bravery of small creatures protecting their young and/or their territory.
Aigle chauve // Bald Eagle ~ Photo by James Geddes: "This eagle seems to be pondering his reflection in the ice. Does he realize it is a reflection? Or is he peering through the ice to the fish below .