Zoologist and explorer George McGavin searches for the world's most spectacular swarms, discovering why they are the ultimate solution to surviving against all odds.

Zoologist and explorer George McGavin goes in search of some of the world's most impressive swarms. By getting right to the heart of these natural spectacles, he finds out why swarms are the ultimate solution to surviving against all odds and discovers how unlocking the secrets to how animals swarm could be crucial to understanding our own increasingly crowded lives.