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

MIGRATION
MANY BIRDS travel far from their breeding site for the winter. This migration allows birds to make use of food available at different times in different parts of the world. To navigate, birds follow landmarks, such as coastlines, and many use the sun and stars as a compass. Some can even detect and follow the Earth's magnetic field.

FLYING IN FORMATION
Snow geese migrate in V-shaped flocks, and take turns being the leader.

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 snow goose (Chen caerulescens), consisting of both a white phase and blue phase (Blue Goose), is a North American species of goose commonly collectively referred to as "light geese". Its name derives from the typically white plumage. Some authorities place this species in the more traditional grey goose genus Anser.