Large flocks of hirundines pass through and migrants can be found or heard on the bank sides and associated bushes and scrub. Tern passage is sometimes notable, the main species being Common. Arctic and Black Terns with the possibility of Sandwich, Little or rarer tern species. Around the area Cuckoo, Green and Lesser Spotted Woodpecker can be heard or seen along with other species on migration. This is comparatively quiet.
Several species are busy breeding and feeding young.
Common Terns sometimes nest on the rafts in Woolley Bay and at the Southwest end of the reservoir and can be seen feeding young. Passerine migrants reappear boosting the already sizeable numbers of breeding birds. In some years a sprinkling of raptors arrive at this time including Osprey, Hobby, Merlin and Common Buzzard. In 1994 nearly all the eleven species of raptors seen were in the autumn. There are a variety of waders and although numbers of each are usually small, they may include Little Ringed and Ringed Plover, Little Stint, Curlew Sandpiper, Dunlin, Ruff, Black and Bar-tailed Godwit, Whimbrel, Curlew, Spotted Redshank, Redshank, Greenshank, Green, Wood and Common Sandpiper.