The world's biggest beasts have always captured the imagination. But whilst being big can have its advantages, it also comes with sizeable challenges. Take the world's largest lizard, the Komodo dragon, whose huge appetite means it must take on prey ten times its weight, or the tallest animal of them all - the giraffe - who, with such a long neck, must control immense blood pressure. Nature's biggest beasts must go to extraordinary lengths to thrive. These are their epic survival stories!
Should a creature's bad reputation impact its survival prospects? As the venomous massasauga rattlesnake edges towards extinction and cormorants in Toronto destroy the trees they nest in, accommodating these misunderstood species has never been more important.
Explore a corner of Namibia dominated by stifling heat and parched sand, where a desolate landscape of haunting beauty lies. While most of Etosha National Park is devoid of growth, its margins are dotted with a series of oases that attract herds of thirsty creatures: antelopes, exotic birds, and the world's biggest elephants.