Kelenken
Kelenken is a genus of extinct predatory birds that lived during the Late Miocene epoch in what is now Patagonia, Argentina. It is known from a single fossil species, Kelenken guillermoi. This bird belonged to the extinct order Phorusrhacidae, commonly known as terror birds, which were flightless birds of prey that dominated South American ecosystems for millions of years.
Kelenken was one of the largest terror birds, with estimates suggesting it stood up to 3 meters
The forelimbs of Kelenken were relatively short and possessed a single, large claw, which may have been