More than 20 seabirds have been found covered in some kind of oil on the North East and Yorkshire coastline.
They've been rescued by the RSPCA from a number of sites, from Amble to Redcar.
Guillemots, puffins, razorbills and gulls have all been affected. Members of the public spotted some on Sunday (17 September) and since then, the RSPCA have been finding more that need rescuing.
The RSPCA say they do not know what the oily substance is or where it is coming from but some birds have died from the trauma.