A mallard duck has been spotted nesting on the side of one of Glasgow's suspension bridges.

Eagle-eyed commuters saw the resourceful bird, who has made her nest in a box hanging off the side of one of the River Clyde's busy bridges.

The duck has been determinedly sitting on her eggs, seemingly oblivious to the hundreds of people passing nearby every day.

Dr Paul Walton, head of habitats and species with RSPB Scotland, said: "Mallard ducks are well known for nesting in window boxes.

"We quite often receive calls from people with similar nests outside their flats, concerned over how the ducklings are going to get down when they're ready to leave.

"The ducklings are so small and light that they can jump from a surprising height without coming to harm.

"The mother leads them to water when they're only about a day old, so this mother duck on the Clyde has actually been quite smart as her ducklings won't have too far to go."

Glasgow is known to have sightings of wildlife, despite its size and built-up environment, such as water voles, peregrines and swifts regularly observed in the city.

Alisdair Woodburn, who took the photographs of the duck, said: "I walk to work most days along the Clyde, and I love watching and photographing the increasing number and range of wild birds so close to the city centre. You never know what you're going to see."

The suspension bridge where the nest is located has not been disclosed to safeguard the birds. All birds and their nests are protected by law in Scotland.