Mother-of-two Lisa Loader, 41, saw the impression on the downstairs
window of her home and feared the owl had been killed with the
impact.
However, after searching outside Ms Loader believes the bird
survived the crash with a few ruffled feathers.
Ms Loader, of Bridport, Dorset, said: "I was scared I would go
outside to find an owl lying on the ground - it looked like it hit
the window really hard.
"Luckily when I went out to take a look there was nothing there, so
we're hoping it survived."
Nik Shelton, who works for the RSPB, said the print was probably
caused by the waterproofing residue found on owl feathers.
He said: "Owls have a natural residue which occasionally leaves
this kind of mark on windows.
"If there was no owl lying around outside it probably picked itself
up and flew off - most likely a bit dazed.
"We do get sent pictures like this from time to time, but rarely
with such detail.
"Hanging tinsel might help prevent this sort of thing. If it
happens a lot we recommend putting stickers of bird silhouettes on
the window."
