Its main feature is a deep freshwater pond, but the surrounding area contains a variety of habitats that provides shelter for over 140 species of birds and other wildlife.

It was leased in 1951 by one Joe Wilson, who began to manage it for wildlife and from whom the site derives its name.

It was purchased in 1970 by the Durham Wildlife Trust, which manages it in conjunction with the adjoining Rainton Meadows nature reserve.

The site is located to the north of East Rainton and to the south of Chilton Moor.

The surrounding scrub areas host large winter flocks of thrushes and all five species of owl are regularly seen.