Tundra Swan
Cygnus columbianus

see larger image Tundra Swan Cygnus columbianus Rosamond Gifford Zoo - Syracuse, NY © 2007 Jeff Whitlock see larger image Tundra Swan Cygnus columbianus Rosamond Gifford Zoo - Syracuse, NY © 2007 Jeff Whitlock see larger image Tundra Swan Cygnus columbianus Rosamond Gifford Zoo - Syracuse, NY © 2007 Jeff Whitlock

Related Links
E.J. Peiker, Nature Photographer
National Geographic
South Dakota Birds
Flickr - may have photos
Wikipedia - may have a species page