In the last days of a drought, as the water level shrinks, bull hippos face more and more competition for the coveted deep river channels. Subscribe: bit.ly/BBCEarthSub Watch more: Blue Planet bit.ly/BluePlanetPlaylist Planet Earth II bit.ly/PlanetEarthIIPlaylist Planet Dinosaur bit.ly/PlanetDinoPlaylist Africa: Countdown to the Rains Kate Humble and Simon King follow the animals living along Zambia's Luangwa River, as a long dry season comes to an end. Welcome to BBC EARTH! Here you'll find 50 years worth of astounding and thought-provoking natural history content. Dramatic, rare, and exclusive, animal videos and nature don't get more exciting than this. Want to share your views with the team? Join our fan panel: tinyurl.com/YouTube-BBCEarth-FanPanel This is a page from BBC Studios who help fund new BBC programmes. Service information and feedback: bbcworldwide.com/vod-feedback--contact-details.aspx