Only a handful of unusual species thought to be living in the wild in Britain
A rare has been spotted more than 9,000 miles from its native habitat drifting down a river in the .
The species, which originated in , is common in wildlife parks in the UK, but is rarely sighted in the wild.
However, Sylvia Herbert was able to photograph the creature as it floated on the River Severn in on Thursday.
The 70-year-old said the area of the river in which she saw the animal is often filled with dozens of water birds, but added she had never spotted a black swan there in three decades living in the city.
“It is quite aggressive - we had actually stopped and I was taking pictures of the cygnets -when we saw this black swan come right up to the side,” she said.
“It doesn’t seem to like the other swans as it keeps chasing them. Black are rather striking, they have a different call to the mute swans.
“I’ve lived in the city for more than 30 years but I’ve never seen a black one before. It looks rather beautiful and a rare treat.”
The small number of black swans living wild in the UK are ancestors of either released or escaped from captivity.