A buffer zone has been put in place around a red squirrel reserve in Northumberland in a bid to protect the species. The reserve in Kielder Forest includes the Cumbrian woods of Kershope and Spaedadam. The buffer zone effectively cuts off the gap between the forest and the Solway Firth to try and slow the migration of grey squirrels to the Scottish border. Within the buffer zone Forestry Commission grants are available to support land managers in controlling grey squirrels by using humane traps. It is hoped that the zone will stop the spread of the pox virus which the grey squirrels carry and which is fatal to the endangered red squirrels.