Llyn Alaw

Llyn Alaw (English: Lily Lake) is a man-made reservoir and is the main water supply to much of north Anglesey. It is a shallow lake and was built in 1966.

The lake is a designated Site of Special Scientific Interest  because of the variety and numbers of wild fowl visiting the lake, especially overwintering birds including the teal, northern shoveler and whooper swan. Other waterfowl include mallard, wigeon, common goldeneye, common pochard, tufted duck, ruddy duck and occasionally pink-footed goose. The lake is only a few metres deep as it was formed by flooding a former bog. The surrounding area is flat with a marshy area to the north of the lake. The shore is bordered by vegetation and has bushes and scrub in some areas.