Autumn brings the world's most spectacular transformations. It is also the last chance to breed, to grow up, to stock up before the cold returns. Chipmunks and beavers stash their winter supplies and many animals-from musk ox to beetles-have to battle for mates.

Originally released by BBC, 2016. Streaming video file encoded with permission for digital streaming by Infobase on May 25, 2017.

Stocking Up: Chipmunk (4:11); --Stocking Up: Beavers (3:58); -- Stocking Up: Grizzly Bears (4:19); -- The Great Escape: Brunnich's Guillemots (5:51); -- The Great Escape: Demoiselle Cranes (4:56); -- The Great Escape: Spider Crabs (2:59); -- Battle to Breed: Darwin's Beetle (5:38); -- Battle to Breed: Muskox (2:41); -- Moving On: Adélie Penguins (5:39); -- Moving On: Cape Gannets (4:48); -- Ready For Winter (2:46); -- Credits: Earth's Great Seasons: Autumn (0:28); .