Volunteers are needed to help cut back overgrown greenery in Wharncliffe Heathlands Nature Reserve on Saturday.
Those attending will be tasked with cutting back birch tree saplings that threaten to shade out the heather that forms the main vegetation cover on the reserve.
The heather also provides habitat for numerous species in the reserve, such as night jar and the common lizard.
The project is a joint initiative between the Wharncliffe Heathlands Trust and Sheffield University Conservation Group.
Anyone who is interested in taking part is asked to meet at the R Don bridge in Station Road, Deepcar, at 11am.
Volunteers are advised to wear stout footwear, warm clothing, gardening gloves and to bring some lunch.
The event will finish by 4pm.