Andrewsarchus mongoliensis, an extinct mammal from the Eocene epoch, is known for its massive skull and carnivorous diet, likely scavenging along ancient shorelines. With its formidable jaw structure, it was among the largest terrestrial mammalian carnivores, playing a crucial role in its ecosystem.

Andrewsarchus mongoliensis, an extinct genus of mammal, is known from fossil evidence found in the Eocene deposits of Inner Mongolia, China. The region where its fossils were discovered is part of the Gobi Desert, which extends into Mongolia and northern China.

During the Eocene epoch, the environment of the region where Andrewsarchus lived was likely more temperate and humid than the current arid conditions of the Gobi Desert. It would have comprised mixed forests and open woodland areas, with a climate that supported diverse flora and fauna.

As a large terrestrial predator, Andrewsarchus mongoliensis would have been at the top of its food chain, preying on smaller terrestrial and possibly aquatic animals. Its ecological niche likely involved scavenging as well as active predation, given its size and presumed carnivorous diet.