Mallard duck males have green heads. Orange-billed swans are Mute Swans, black-billed are rare Trumpeter Swans, which were re-introduced into the wild after being close to extinction.
Canon EOS 5D Mark II, f/11 @ 140 mm, 1/80, ISO 50, No Flash
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Keywords:Mute Swans, Trumpeter Swans, al kay, alkay, waterfowl
