Fleet Pond is the largest freshwater lake in Hampshire. The nature reserve has 141 acres (57ha) of varied habitats including heathland, woodland, reedbed and marsh, and is home for many species of birds, butterflies, dragonflies and wild flowers. The Pond itself is 52 acres (21ha) so covers some 35% of the total area of the reserve. Most of reserve (48acres) is designated as Site of Special Scientific Interest (SSSI) because of the diversity of flora and fauna. Only Wood Lane Heath has not yet benefited from this designation but is a Site of Importance to Nature Conservation (SINC). Brookly Wood was added to the Local Nature Reserve status in 1977. The whole area was notified a Local Nature Reserve in 1977 bringing further protection and helping to define its role as a valuable local amenity.