What were predators to the gastornis?

Gastornis, a large flightless bird that lived during the late Paleocene to early Eocene epochs, likely faced few natural predators due to its size. However, young or juvenile gastornis may have been vulnerable to large carnivorous mammals, such as early members of the order Carnivora, and possibly large reptiles. Additionally, competition for food and habitat with other large herbivores could have also impacted their survival. Overall, while adult gastornis had few predators, their young faced more risks in their environment.