RSPCA inspectors are investigating reports of a big cat sighting.
Pamela Cromar, of Richmond, in North Yorkshire, spotted the cat from her home, in the town's Reeth Road, last week.
Mrs Cromar said the creature was stalking prey in woodland.
She said: "It was too big to be a domestic cat or dog. My friend and I saw it across the river from us, it was going after a deer.
"I did not feel in any danger, as it was quite a distance away from us, and it seemed intent on catching its prey.
"I wanted to get indoors fairly quickly after I saw it, though."
Mrs Cromar said she had reported the creature to the RSPCA and the police.
The creature is described as having black fur, and a long tail, about 20in.
An RSPCA spokeswoman said sightings could be reported to the organisation's 24-hour advice line, on 0300-123-4999.
(Original headline: Big cat spotted stalking prey in woodland )
