Scotland's red deer are breeding earlier each year, according to scientists studying the impact of climate change on the species.

It is thought to be the result of improved grazing, due to the longer growing season in spring and summer.

Scientists have been studying the red deer population on the Isle of Rum since 1953.

It is one of the longest running research projects of its kind anywhere in the world.

The climate change research is based on data gathered since 1980.