People who are dumping engine oil into drains are putting wildlife at extreme risk, according to RSPCA experts.
The warning comes after two swans were rescued from the Little Ouse river in Thetford having become contaminated with oil on October 18.
It is thought that someone is dumping oil in a drain which is filtering into the river where Mill Lane and Nuns Bridges Road meet.
RSPCA acting chief inspector Craig Plumley said it was a ‘serious situation’.
“If oil is not removed from waterbirds it reduces the natural waterproofing in their plumage, leaving them at risk of dying from hypothermia,” he said.
See more in Friday’s Bury Free Press.