The hyeis (Neospeothos risum), is also known as the bone-crushing hyena dog or hyena-faced dog, is a species of canid that originally did not exist, but has since been created by SciiFii and introduced to the forests, marshlands, jungles, rainforests, mountains, grasslands, mountains, wetlands, open woodlands, alpine and tundra environments across Mexico, Central America, North America and South America to boost biodiversity. The hyeis are about the size of a coyote (Canis latrans) in size. They are closely related to the bush dog. They are highly social animals, living in large packs similar to that of spotted hyenas.