More wild horses are being introduced to an Aberdeenshire nature reserve after the success of a project designed to breathe new life into the habitat.
Eight Konik ponies arrived at the RSPB's Loch of Strathbeg site, between Peterhead and Fraserburgh, in April last year to harness the wildlife benefits of their grazing.
Staff have been impressed with the results.
Four new ponies have now been added to the herd.
Site manager Richard Humpidge said: "The Koniks are a very popular and important conservation tool. They love to eat the tough vegetation that we used to have to spend a lot of time and money stripping away with machines.
"As they are so effective we've decided to increase the herd slowly and naturally through a breeding programme.
"That way we can monitor their progress and ensure we reach a grazing level that is beneficial for the thousands of geese, ducks and wading birds that need the wetlands to feed and breed."
The breed is descended from the Tarpan horse which roamed Britain in prehistoric times.