Heart Leech

Heart leeches were parasitic animals that appeared in the Gears of War comics. Dwelling within the Hollow, these grotesque creatures earned their name by latching on to the chests of their victims, pulling open the rib cage and then devouring the heart whilst it is still inside the victim's body. Heart leeches were not affiliated with the Locust Horde and humanity was aware of their existence long before the Locust War.