Snow owl in love with a tennis ball: Wiggly and Tennislover - rush in here!
It is a German article with regard to a German wildlife park, so I just summarise the story.
A snow owl, six weeks of age, fell in love with a tennis ball. She plays with it, keeps it under her wings and grabs it with her claws. The owl was rather tiny at birth, so it was brought up by humans and kept with mice and rats. The game wardens are clueless about what to do.
Interesting enough: neither the sex of the owl or the ball is determined yet.