Notes: Tiny duck. Glossy green upperparts, white underparts boldly
vermiculated on sides. Male (breeding) has dark green head and neck with a white
cheek-flash. Male (non-breeding) has face & chin spotted, neck mottled. Female
lacks the dark head & neck, but usually has a strong dark eye-line continuing
back to nape. In flight note all-black primaries, white secondaries. Cf.Cotton Pygmy-goose. On deep permanent
freshwater lakes. Rarely seen ashore.