In Ruaha, Tanzania lions form huge 'super prides' in order to hunt giants. Among cats, lions are unusual as they are the only one to live in groups. In numbers they find the strength and audacity to hunt the most formidable prey.In Sri Lanka, a tiny rusty spotted cat explores his forest home. Two hundred times smaller than a lion, the rusty spotted is the smallest of all cats, but just as curious.The Canada lynx lives further north than any cat, relying on snowshoes hares to survive the bitterly cold winters. Until now lynx were creatures of mystery - but now technology provides an insight into their secret lives.