Biology
Predator-Mediated Coexistence in Sympatric Ungulate Communities
Quick fact
In the Serengeti, wildebeest, zebra, and Thomson's gazelle coexist partly because lions and hyenas preferentially hunt the most abundant species, preventing any one from outcompeting the others.
Why this is interesting
Imagine a savanna with dozens of antelope species coexisting, even though they all eat grass. How can this be? Surely competition should eliminate all but the best? The answer lies in the sharp teeth and keen eyes of predators.