Want more natural history and wildlife videos? Visit the official BBC Earth channel: http://bit.ly/BBCEarthWW BBC Earth The BBC Earth YouTube channel is home to over 50 years-worth of the best animal videos from the BBC archive. With three new videos released every week there’s something for all nature loves from astounding animal behaviour to beautiful imagery. Click here to find our more: http://bit.ly/BBCEarthWW For more brilliant natural history shows, exclusive to YouTube, head over to our brand-new channel Earth Unplugged! http://www.youtube.com/earthunplugged Roaring in another lion's territory is the ultimate insult. Will Simba let these two intimidating new arrivals step on his turf? From the BBC.