Roe deer are the only native deer on the Forest. They are strongly territorial and so can regularly be seen in the same areas. The Ashdown Forest population increased after the great storm of 1987 which re-structured a great deal of the woodland, creating grassy glades and open rides. Roe deer are more commonly found on the edge of agricultural land. Roe deer live in small family groups of two or three animals but they are very shy and difficult to see. There are probably less than two dozen family groups on the Forest.