Giant Crocodiles Ruled South America's Wildlife

Fossilized bite marks discovered in Colombia provide compelling evidence that giant crocodile relatives reigned supreme in South America's ecosystems approximately ten million years ago. These ancient apex predators, identified as relatives of modern caimans, occupied the top of the food chain during the middle Miocene epoch.

The artistic rendering depicts an attack by *Purussaurus neivensis*, a colossal crocodile species believed to have dominated the region's fauna. This prehistoric giant far surpassed the size of contemporary crocodilians. For context, the largest living crocodilian, the saltwater crocodile, can reach lengths of six meters and weigh up to a ton. The specimen known as 'Lolong,' captured in the Philippines, weighed approximately 1075 kilograms, illustrating the immense scale of modern crocodilians, yet still dwart compared to their ancient counterparts.

Crocodilians, which encompass true crocodiles, alligators, caimans, and gharials, represent one of the two surviving lineages of archosaurs, an ancient group of reptiles that also includes birds. Their evolutionary persistence highlights a remarkable success story in the animal kingdom, with these modern reptiles retaining a more direct physical resemblance to the planet's former rulers than, for instance, a small bird like the goldcrest.