![Nature's Great Events](https://image.chilimovie.com/public/300px/20180710/cbzbvNe8ht9jSHKsNPXfx5I9BWi.jpg)
The summer plankton bloom in the north-east Pacific draws in animals in great numbers, from the billion-strong shoals of herring to migratory humpback whales.
Millions of animals time their migration across the Kalahari Desert to coincide with the the annual flooding of Botswana's Okavango Delta.
A look at the sardine run, which happens each winter along the South African coast.
The story of a lion family's struggle to survive until the return of the great migration.
The summer melt of Arctic ice provides opportunities for millions of animals.