Think you know the animal kingdom? It’s easy to spot a Lion or an Elephant, but can you tell a Jaguar from a Leopard, or recognize a rare Okapi from a single close-up? We’ve gathered 40 of the world's most fascinating creatures — from the African savannah to the deepest oceans. 90% of challengers fail the camouflage and rare species rounds. Do you have the 'Eagle Eyes' of a master biologist? Grab your camera and let’s find out.