Plot Synopsis

Animals move as millions, but survive as one, as they their undertake arduous journeys to ensure the survival of their species. This seven-part series -- shot from land and air, in trees and cliff-blinds, and on ice floes and underwater -- documents the most diverse range of animal migrations, including: Botswana zebras; Mali elephants; Red crabs on Christmas Island; Flying foxes in Australia; Army ants in Costa Rica; Pacific great white sharks; and more. Plus, GREAT MIGRATIONS features the following never-before and rarely seen animal behaviors on film: a herd of Mali elephants that pay tribute to a calf who died in the scorching sun; a male zebra risking his own life while patiently encouraging a foal to leave his slain mother; a group of 10 male sperm whales that rub up against one another with surprising intimacy; massive numbers of white-eared kob of the Sudan, thought to have been wiped out during 20 years of violent unrest; a walrus crisis in the Russian Arctic, possibly caused by global warming; a butterfly to which the crew attached a radio transmitter for the first time.