 Since the 1950s, the reservoirs have been providing a refuge for wildfowl while they are vulnerable during the late summer moult, and in some years, moulting flocks of great crested grebe have also used the reservoirs as a refuge.The reservoirs have also been used by migratory birds as a stopover site in autumn and spring, and yellow wagtail regularly breed here.A total of over 85 species of wetlands birds have been recorded at the site.