Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
A mighty army of dolphins, sharks, whales, seals and gannets hunt down the billions of sardines along South Africa’s east coast each winter. This is the sardine run: an underwater Armageddon, the greatest gathering of predators anywhere on the planet, and the most spectacular event in the world’s oceans.
Duration : 0:1:16
A visit to The Natural History Museum in London’s South Kensington.
Duration : 0:4:18
Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
Every year grizzly bear families in North America depend for their survival on a spectacular natural event: the return of hundreds of millions of salmon from the Pacific Ocean to the mountain streams where they were born. In this clip, dozens of hungry bears eagerly await the salmon that make it up river.
Duration : 0:1:26
Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55
Find out more: http://www.bbc.co.uk/naturesgreatevents
In late summer the plankton bloom is at its height. Vast shoals of herring gather to feed on it, diving birds round the fish up into a bait ball and then a humpback whale roars in to scoop up the entire ball of herring in one huge mouthful.
Duration : 0:1:15