Guys farm is a 116 ha arable holding of which a 40ha block has been reverted since 2007 to create grazed wet grassland with carefully managed water levels. Located between the Ouse Washes and Nene Washes (both internationally important for their wetland birds), the wet grassland site offers ideal conditions for breeding waders such as lapwing, snipe and redshank, all species whose national populations are recognised as being in decline. Parts of the site have been lowered with machinery to create shallow pools of standing water during spring and early summer, providing foraging areas for wader chicks and adults. When required water is pumped onto the site to maintain surface water.

Other features of interest on the grassland include the cattle/sheep which are important in maintaining a tussocky sward structure that meets the requirements of ground nesting waders. Brown hare and skylark also benefit and are prominent in this open expanse of grassland.