CAPTION: Tundra Swan - Long neck and large, webbed feet
THIS MEDIUM-SIZED SWAN exists in three slightly different forms. The form that lives in North America is often called the whistling swan. Male and female swans pair for life. When they migrate southward after breeding, their young fly with them, and the family stays together until the following spring.

Captured from a WONDERFUL MULTIMEDIA CD-ROM title,
"Eyewitness Encyclopedia of Nature",
Dorling Kindersley Multimedia, 1995

Dorling Kindersly Multimedia
(reviewed by Univ. of Texsas Library)
http://volvo.gslis.utexas.edu/~reviews/dkmm.html

For more images captured from the CD-ROM title,
http://bioinfo.kordic.re.kr/animal/APAsrch2.cgi?qt=DKMMNature-

The tundra swan (Cygnus columbianus) is a small Holarctic swan. The two taxa within it are usually regarded as conspecific, but are also sometimes split into two species: Bewick's swan (Cygnus bewickii) of the Palaearctic and the whistling swan (Cygnus columbianus) proper of the Nearctic.