Fox Hagg

Fox Hagg is a small (33.25 hectares (82.2 acres)) nature reserve in the Rivelin Valley area of Sheffield, England.

[3] The geology of the steep rocky hillside comprises sediments of sandstone, gritstone, mudstone conglomerates and impermeable shales, all dating from the Carboniferous period and indicative of a fluvial environment.

[4] Permanent settlements were established during the Neolithic and Bronze Age with evidence of tree clearance indicating early agricultural exploitation of the land.

A number of species of high conservation concern, the song thrush and willow tit have been observed at the reserve.

[4] A small mammal survey, carried out in 2005, indicated that voles, field mice and pygmy shrew lived at the reserve.

The hoverfly, Cheilosia albipila and the orange tip butterfly (Anthocharis cardamines), favour the marshy conditions found at wetland locations within the reserve.

Work to thin the wooded areas of the site have been funded by the Forestry Commission, as has the installation post and rail fence at the Lodge Lane car park.