Chris looks at social intelligence in the animal kingdom and finds out why it is that, for animals, being together means being clever. He looks at how lions hunt in teams and each hold a very specific position, how vampire bats build trust and donor networks through grooming, and how wild wolves first became domesticated and transformed into man's best friend.
The Mackenzie Delta is an Arctic network of channels and islands at the mouth of Canada's largest river. It's home to the ancient Inuit, as well as a variety of highly specialized wildlife, including the sonorous sandhill and majestic peregrine falcon. Follow them as they contend with a rapidly changing climate.
From the stealthy tarantula to the prehistoric Komodo dragon to the deceptive mosquito--one of the more prolific modern predators--killers come in all shapes and sizes. Join us as we examine the deadly adaptations of these cold-blooded culprits.
This instalment is the first of several to concentrate on mammals. The platypus and the echidna are the only mammals that lay eggs (in much the same manner of reptiles), and it is from such animals that others in the group evolved. Since mammals have warm blood and most have dense fur, they can hunt at night when temperatures drop. It is for this reason that they became more successful than their reptile ancestors, who needed to heat themselves externally. Much of the programme is devoted to marsupials (whose young are partially formed at birth) of which fossils have been found in the Americas dating back 60 million years.
Cameras follow the team every sweaty step of the way as they explore the beautiful wilderness of Guyana, from abseiling down one of the most powerful waterfalls in the world to climbing to the very top of the rainforest trees. Known as the land of giants, Guyana is home to the huge anaconda, the world's largest tarantula and giant otters.