Kelenken vs Smilodon

Kelenken are giant flightless predatory birds of the extinct family Phorusrhacidae, and are known as “terror birds”. The type and only species is K. guillermoi, first formally described in 2007 after the find in 1999. It is the largest known member of the family. Illustration depicts of a Terror Bird about to strike its pointed beak on a smilodon. Editorial illustration for a dinosaur magazine