Chris Packham sees how the fox's senses, intelligence and flexibility helps it buck the trend of carnivores struggling to compete in a world with a rocketing human population.
Chris Packham explores the ways in which ants have managed to achieve their global success, including natural air-conditioning systems and shelters made from their own bodies.
Chris Packham delves beneath the skin of the big cats to explore what makes them such good hunters, and reveals that it's not all about brawn.
Chris Packham explores the specialised adaptations that have enabled bears to thrive, including how a polar bear's hollow fur allows it to feed throughout the Arctic winter.
Chris Packham explores details of the penguin's anatomy, using new research to reveal how its legs, wings and body shape have allowed it to conquer a range of habitats.
Chris Packham reveals how hairs on the skin help keep elephants cool, how sensors in their feet may guide them towards rain and how a pouch in their mouths stores water.
Chris Packham explores how snakes use their senses to hunt, from heat-sensitive pits used to capture prey in the dark to tongues used to lure fish.
Chris Packham explores bats' incredible anatomy, physiology and senses to understand what enables them to thrive in some surprising places.
Chris Packham reveals how a dolphin pod uses body movements to communicate the location of food and explores the strategies used by orcas during a hunt.
Chris Packham reveals how the crocodile's circulatory system enables it to hold its breath underwater for over an hour and how sensitive skin helps detect its prey.
Chris Packham explores the evolution of the great ape's brain to reveal how different parts have been adapted over time by its anatomy, ingenuity and sociability.