The Great Migration of Serengeti National Park, designated a World Heritage Site, is legendary. The stars of this 1,200-mile odyssey are the wildebeest – 1.5 million of them – accompanied by 200,000 zebras. Every year is an endless journey for them, chasing the rains across 150,000 square miles of woodlands, hills and open plains. With them having firmly established their caliber as a species built literally for the long run, the migration spectacle should probably be the only space where the wildebeest find a mention. But conservation debates are hovering over these beasts – categorized as non-threatened by the IUCN – and looking at them as a keystone species.