Three years in the making, and from award-winning National Geographic cinematographers, Great Migrations on DVD is a landmark series featuring the epic struggles of animal migrations around the planet and the groundbreaking science behind these life-or-death marathons.

National Geographic provides an unparalleled look at the volume and diversity of wildlife that face countless obstacles in the name of self-preservation or the survival of the species--from jellyfish and wildebeests to walruses and monarch butterflies.

National Geographic: Great Migrations was filmed over 3 years in stunning high-definition and reveals never-before-seen animal behavior. It features breakthrough filming technology and is narrated by Alec Baldwin