Corpse Eaters

Corpse Eaters are a species of mutant that make an appearance in Metro 2034.

Overview
Corpse Eaters are described as having grey, saggy skin and insect-like eyes. Their diet (as is made obvious by their name) consists of corpses of any variety - including even those of their own species. They are a non-aggressive species, and exist solely as scavengers. Their main forms of communication are strange howling sounds. In the novel, the movement of corpse eaters is described as being "clumsy" and "shuffling".

Metro 2034
The Corpse Eaters are encountered by Hunter and Homer at Nakhimovsky Prospekt. As one of the corpse eaters howls, the others begin to move away from the two men. Hunter shoots one of the Corpse Eaters; as they leave, they watch the other Corpse Eaters move in to eat the fresh corpse of the member of their own species killed by the former ranger.

Trivia

 * Corpse Eaters make an appearance in the Metro 2033 board game as one of the mutant threat cards even though they are not a significant threat to humans.