The nominate form of Tundra Swan, differing mainly in an
all-black bill with just a yellow spot, although hybrids occur and the two subspecies may represent
extremes of a cline. There is a size difference but genetic studies are required. Breeding across North
America and wintering on West and East coasts, vagrants have occurred in Europe including the UK. I haven't
been lucky enough to photograph one so these are captive birds.
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HOMEPAGE
