A woman returned to her Cumbrian home to find a near perfect imprint of an owl on her window.
The bird had apparently crashed into the window of Sally Arnold's Kendal home, leaving the bizarre image - complete with eyes, beak and feathers.
Experts said the silhouette was left by the bird's "powder down" - a substance protecting growing feathers.
Mrs Arnold said she could find no sign of the owl, so assumed it had flown off without serious injury.
She said: "Our first concern was for the welfare of what we suspected was an owl and we opened up the window to check if it was still around.
"Fortunately, there was no sign of the bird and we can only assume that it had flown away probably suffering from a headache." (read more)