{
  "id": 1531995,
  "title": "Massive Prehistoric Crocodylians Took a Brutal Approach to Hunting",
  "url": "https://urgent.news/2026/08/17/massive-prehistoric-crocodylians-took-a-brutal-approach-to-hunting",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-17T18:00:00.000Z",
  "source": {
    "name": "Nautilus",
    "slug": "nautilus",
    "url": "https://nautil.us/massive-prehistoric-crocodylians-took-a-brutal-approach-to-hunting-1283897/"
  },
  "original_language": "en",
  "account": "Over 10 million years ago, during the Middle Miocene period in South America, an extensive freshwater lake known as the Pebas megawetland system thrived in the northwestern part of the continent. This lake was rich in biodiversity and gave rise to a variety of gigantic crocodylians, which dominated the food chain, according to a recent study published in the Journal of Vertebrate Paleontology. Researchers from the University of Helsinki, along with an international team of paleontologists, reached this conclusion after analyzing fossils found in the region.\n\nDespite fierce competition from saber-toothed marsupials, flightless \"terror birds,\" and giant anacondas, the availability of ample food sources allowed these formidable predators to ascend to the apex of the ecosystem. Study author Oscar Wilson stated that there was so much prey available, mammalian predators couldn't have consumed it all. The prey consisted of enormous creatures like ground sloths and prehistoric rhino relatives.\n\nThe fossils of these megafauna revealed distinctive signs of predation left by crocodylians, such as circular puncture wounds primarily around the head, neck, and jaws. This pattern of injury is also seen in living crocodiles, which employ ambush tactics to capture their prey and drag their heads beneath the water to finish the kill. The only croc with a powerful enough bite force to inflict such injuries was Purussaurus neivensis, a relative of modern-day caimans. This species was as long as a school bus, weighed nearly two tons, and had a voracious appetite.\n\nPurussaurus neivensis played a crucial ecological role in these tropical environments by controlling herbivore populations and providing leftovers for scavengers in the food chain. Researchers note that sebecids, longer-limbed terrestrial crocodylians that lived in the same area, likely scavenged from Purussaurus' leftovers. Given the formidable predators they had to face, it is remarkable that South American megafauna managed to survive for as long as they did.",
  "summary": "You wouldn’t want to see these eyes peering out of the swamp The post Massive Prehistoric Crocodylians Took a Brutal Approach to Hunting appeared first on Nautilus .",
  "key_points": [
    "Pebas megawetland system thrived 10 million years ago in South America",
    "Researchers found evidence of Purussaurus neivensis predation patterns",
    "South American megafauna survived due to apex predator control"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}