Have you ever seen an owl swim? Other birds which are not water birds sometimes do out of necessity, like Eagles when they go after fish, but I have never heard of an owl doing so. A birder and photographer in Chicago captured video of an owl swimming in Lake Michigan after it was forced into the water by two peregrine falcons. There is no footage of the falcons, but the short video of the owl is amazing:
Here is the bird in the water:
And after it got out:
A bird rescue was called but the owl got out and flew off on its own. Smart owl!