This bird has gone extinct some 2.5 million years ago and it ruled South America for tens of millions of years.
More than 90 percent of the bird’s skeleton was unearthed and this makes it the most complete terror bird specimen found.
The terror bird discovered is called Llallawavis scaligai. Paleontologists are finding more on the bird’s family.
Lawrence Witmer, paleontologist from Ohio University, who was not part of the study said, “It’s rare to find such a complete fossil of anything, let alone a bird, this is a very exciting find.”
Researchers said that Llallawavis lived around 3.5 million years ago, this period is falling near the end of terror birds reign.
The bird weights 40 pounds and it is about four feet tall.
Dr. Federico Degrange, a researcher at the Center for Research in Earth Sciences in Argentina, who led the study said, “The discovery of this species reveals that terror birds were more diverse in the Pliocene than previously thought, it will allow us to review the hypothesis about the decline and extinction of this fascinating group of birds.”
Researchers said that they have CT scanned the inner ear structure and they found that these birds were able to hear low pitch sounds like the present day ostrich.
Low-frequency sounds are good to hear the prey movements and also for long distance communication.
Researchers needs to further analysis on the bird which can give more information on the other senses of the bird like vision.
The findings of the study are published in Journal of Vertebrate Paleontology.