The Gobi bear, Ursus arctos gobiensis (known in Mongolian as the mazaalai / Мазаалай) is a subspecies of the brown bear, Ursus arctos, that is found in the Gobi Desert of Mongolia. It is listed as critically endangered by Mongolian Redbook of Endangered Species and by the Zoological Society of London using IUCN standards, the population included only around 20 adults and were separated by enough distance. Gobi bears mainly eat roots, berries, and other plants, sometimes rodents, there were no evidence that they ate large mammals. Small compared to other brown bear subspecies, adult males weigh about 96.0–138.0 kilograms (211.6–304.2 lb) and females about 51.0–78.0 kilograms (112.4–172.0 lb). The Gobi brown bear is sometimes classified as being of the same subspecies as the Tibetan blue bear; this is based on morphological similarities, and the belief that the desert-dwelling Gobi bear represents a relict population of the blue bear. However, the Gobi bear is sometimes classified as its own subspecies, and closely resembles other Asian brown bears.