In the Film A satellite view of the west coast of North America zooms in on the Baja California peninsula, the Gulf of California, and the mainland of Mexico. This area is the destination for a number of migratory species. Several of these species, such as the Elegant Tern, Heermann's Gull, elephant seal, and gray whale, are featured in the film. Concept Any place on Earth can be identified using a coordinate grid system of latitude and longitude.
Some animals migrate great distances between specific places.
The lines running north and south are lines of longitude , or meridians . These lines of longitude come together at the North and South Poles and the distance between them is greatest at the equator. Measurements are then made 180 degrees to the west and 180 degrees to the east from Greenwich. East-west lines of latitude circle the Earth parallel to the equator, which is 0 degrees. The poles are 90 degrees north and 90 degrees south latitude.