Winter bird species seen include wigeon, teal, common snipe, jack snipe, goosander, and goldeneye. The reservoir carries nationally important wintering populations of tufted ducks, pochard, goosander and common goldeneye. The reservoirs carry nationally important wintering populations of tufted ducks, pochard, goosander and goldeneye. The reservoirs support nationally important wintering populations of tufted ducks, pochard, goosander and goldeneye. Wintering wildfowl include teal, mallard, shoveler, shelduck and goosander. The most common aquatic birds are the goosander and tufted duck. Tufted duck, goldeneye, wigeon, teal and possibly goosander with sometimes smew and scaup. Amongst the most recorded are tufted duck, goldeneye, goosander and common teal. The rare goosander can be seen on the Slaney at Kildavin. Old hollow pine trees provide good nesting places for the goldeneye and goosander. These include, "inter alia", kingfisher, sandpiper, goosander, grey wagtail, moorhen and dipper. There were eider (11.45% of the UK population), bar-tailed godwit (1.93%) and goosander (1.04%). The goosander, recently arrived as a breeding species in Ireland, can sometimes be seen here.