Paleontologists have unearthed the fossilized remains of large teratornithid birds at four localities in central Argentina. Teratornis sitting on the extinct proboscidean Notiomastodon. Image credit: Universidad Maimonides. Teratorns are members of Teratornithidae, a highly diversified guild of large carnivorous flying birds that lived between 25 million and 12,000 years ago. Their fossil record is limited exclusively to North and South America. The...
