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Arctodus is an extinct genus of short-faced bear that inhabited North America during the Pleistocene (~2.5 Mya until 12,800 years ago). There are two recognized species: the lesser short-faced bear (Arctodus pristinus) and the giant short-faced bear (Arctodus simus).
It can reach a shoulder height of over 1.6 m (5.2 ft) and total length of as much as 3.1 m (10 ft). The heaviest wild polar bear weight recorded was 1,002 kg (2,209 lb). The Kodiak bear, a brown bear (U. arctos) subspecies, rivals the polar bear in size, but is slightly smaller. It has a similar body length with the largest confirmed wild ...
[148] [149] Another huge bear was the giant short-faced bear (Arctodus simus), with the average weight of 625 kg (1,378 lb) and the maximum estimated at 957 kg (2,110 lb). [150] There is a guess that the largest individuals of this species could reached even larger mass, up to 1,200 kg (2,600 lb). [ 148 ]
Polar bear on Wrangel Island. Wrangel Island is a breeding ground for polar bears—having the highest density of dens in the world—bearded and ringed seals, walrus, as well as collared and west and east Siberian lemmings, a major food source for terrestrial carnivores, namely the Arctic foxes, wolverines and wolves which also inhabit the island.
The polar bear is a major predator of Arctic seals and walruses, particularly pups. Bears may seek out seals, or simply wait for them to come by. Other terrestrial predators include cougars, brown hyenas and various species of canids, which mostly target the young. [103]
The sun bear (Helarctos malayanus) is a bear species in the family Ursidae found in the tropical forests of Southeast Asia.It is the only species in the genus Helarctos [5] and the smallest bear species, standing nearly 70 cm (28 in) at the shoulder and weighing 25–65 kg (55–143 lb).
The transition between Deninger's bear and the cave bear is given as the last interglacial, although the boundary between these forms is arbitrary, and intermediate or transitional taxa have been proposed, e.g. Ursus spelaeus deningeroides, [12] while other authorities consider both taxa to be chronological variants of the same species. [13]
Adults typically range from 120 to 200 cm (47 to 79 in) in head-and-body length, and 70 to 105 cm (28 to 41 in) in shoulder height. Although they are the smallest bear species in North America, large males exceed the size of other bear species, except the brown bear and the polar bear. [43]