Migration nation: animals on the go from coast to coast

Migration by land. Snake road: along the herptile highway ; The pronghorn path: life in the fast lane ; Bison boulevard: the high road and the low road ; Polar bear parkway: exit north

Migration by sea. Manatee trail: no speed limit necessary ; Salmon street: born to run ; The gray whale way: Baja or bust

Migration by sky. The crane corridor: rush hour in the sky ; The monarch flyway: the great glide.