The RSPB has urged the public to take care when disposing of plastic bags.
RSPB Scotland spoke out after a visiter to the Outer Herbrides photographed the bird carrying a plastic bag in its beak.
The bird was seen on a loch in a remote part of North Uist.
Jamie Boyle, site manager of the RSPB’s Uist reserves, said: “We urge people to take great care in the way they dispose of plastic bags or, indeed, any other rubbish, particularly balloons and Chinese lanterns. They pose a direct threat to our wildlife and it is depressing to think plastic bags are even reaching remote lochans in a place like North Uist.
“Marine birds such as red-throated divers are particularly at risk, both at sea and on their breeding grounds, where they can mistake the bags for fish or mistakenly use them for nesting material. If a bag becomes entangled on their legs or heads it can prove fatal.”