Bathornis

Bathornis, being a very large terrestrial predator, spends a good portion of its time on the move. Its long, strong legs are good for running, as well as kicking. Not being able to fly, they rely on their legs to get around and chase prey. Powerful kicks of the legs aid Bathornis in killing its prey, however, it has primarily relied upon its beak to deliver the final blows. The powerful crushing action of the beak would have allowed it to break apart extremely tough prey, potentially even crushing bone. It may have still used its wings only for mating display. Being a predator, it doesn’t seem likely that Bathornis is very social, only needing to hunt alone. Still, it does care for its young in some capacity.