It begins on Europe, following the ending of winter on a riverside, where European robins, cuckoos and kingfishers feed with the plenty of spring.

The film also showcases a group of Japanese cranes dancing as a mating ritual and a flock of Bar-headed geese escaping an avalanche on the Himalayas.

Clark's greebe run in the water in sychrony to court before a group of American white pelicans arrive.

Greater sage-grouse fight for the right to mate, while Snow geese make one final stretch to reach the Arctic Circle just in time for spring.

The tundra bursts with life as hatchlings of dozens of migratory species begin to hatch, from Whooper swans and Common loons, to Sandhill cranes, Snowy owls, and Snow geese, with one hatchling being chased by a Parasitic jaeger for getting too close to its nest On the coasts of the Arctic Ocean, as summer reaches its peak, Common eiders plunge into the water while Puffins run the gauntlet of Great skuas.

The good times do not last for long, however, for as autumn arrives, food becomes scarce, and birds must now fly back south.

The Barnacle geese flock fly once again through the same route they came from, soaring over a stormy sea and having to land on top of a navy ship when the weather worsens; Meanwhile, the Canada and Snow geese fly through redwoods as winter beings to close in, running the gauntlet of hunters who kill some of the flock.

Great white pelicans fly inland to a large wetland to feed in vast numbers alongside other birds like Black heron, White-faced whistling ducks and African darters.

The final stretch follows the Antarctic ocean, where on the Falkland Islands, Rockhopper penguins and Black-browed albatross come to breed every year.

On other antarctic islands, King penguins assemble in large flocks to breed, reducing, not eradicating, the threat of predators, as a group of Giant petrels catch and kill one hatchling.

The Eurasian robin and the kid from the beginning of the movie witness the flock of Greylag geese, along with the one with the tangled net remains, stop momentarily before continuing their flight north once again.