It's taken millions of years for animals to adapt to places as different as the high Andes and the sweltering Amazon; the windblown Patagonian steppe and the swamps of Venezuela - the result is an incredible diversity of species.

It's taken millions of years for animals to adapt to places as different as the high Andes and the sweltering Amazon; the windblown Patagonian steppe and the swamps of Venezuela - the result is an incredible diversity of species.