Hooded Mergansers — Framed PieceA pair of Hooded Mergansers on rippled water the male in foreground with his extraordinary black and white crest fully raised, the female behind him with her rust coloured head and subtler plumage. This 1987 watercolour is a study in the dramatic sexual dimorphism of the species: the male's crest is one of the most theatrical displays in North American waterfowl, and Glen rendered it with complete precision. The water surface below the birds carries