Himalayan black bear

The Himalayan black bear (Ursus thibetanus laniger) is a subspecies of the Asian black bear. It is distinguished from U. t. thibetanus by its longer, thicker fur and smaller, whiter chest mark.[4] The species is considered an ecological indicator and a keystone species of the environment.[5] The species plays a vital role as a primary seed disperser in maintaining the stability of the ecosystem.[6] On average, they measure from 56 to 65 inches (140 to 170 cm) nose to tail and weigh from 200 to 265 pounds (91 to 120 kg), though they may weigh as much as 400 pounds (180 kilograms) in the fall, when they are fattening up for hibernation.[7]

The Himalayan black bear is typically nocturnal and elusive, although it has been observed during the day.[8] It hibernates throughout the winter in the northwestern Himalayas, while it is usually active during the entire year in the eastern Himalayas.

The species' fossilized remains were discovered in Germany and France, but currently, it only exists in Asia, mainly confined in the Himalayas of India, Bhutan, Nepal, China, and Pakistan. During the summer, black bears can be found in warmer areas in Nepal, China, Bhutan, India and Tibet up near the timberline. The species prefers moist temperate forest mixed with deciduous broad-leaved forest, and mixture of oak, and thick dense under layer of shrubby vegetation between 1500 m to 3000 m elevation, and subtropical pine forest between 900 m to 1700 m elevation.[9] For winter, they descend as low as 5,000 feet (1,500 metres), to more tropical forests. The species might with the distribution of U. t. thibetanus across Myanmar and northeast India to possibly Nepal in the Himalayan range.[10]

This subspecies is listed as 'vulnerable' due to encroachment of human population, forest fires and the timber industries; these have all reduced the bear's habitat. There is also a high mortality rate among the newborn. And even though hunting of the black bear has been forbidden since 1977, there is still a large problem with poaching.[7]

Over the last thirty years, the world black bear population has declined by 30–40% and it is predicted that the same rate will continue for the next thirty years unless effective conservation measures are implemented.[11] Habitat fragmentation, habitat loss and destruction, conversion of bear habitat into agricultural land as well as other anthropogenic pressures are significantly influencing the black bear population and its habitat [12] Climate change is predicted to cause a shift in the existing suitable area or increase the suitable area for the Asiatic black bears, leading to disturbances in habitat connectivity.

Therefore, it is necessary to establish climate refugia and corridors that can enhance connectivity between countries and facilitate the dispersal of bear populations. Research suggests that more than 70% of suitable habitat in the Himalyan Black Bear habitat will remain as climate refugia in the future, but a reduction of more than 25% in suitable habitat could be challenging, especially in cases of transboundary bear populations.[8] Various conservation agencies of Himalayan black bear countries can facilitate to work together and develop corridors to enhance connectivity between them. The protection and management of selected hotspot areas with significant intact habitat can also provide more area and facilitate dispersal among populations, leading to an increase in the chances of gene flow that results in genetic diversity and an increase in population size of the species. Current nature reserves/protected areas should be upgraded by connecting adjacent suitable habitats. In countries with low bear populations, such as Nepal and Bangladesh, the reduction in suitable habitat could be most severe.[8] Thus, establishing movement corridors between these protected areas is a key means for helping to conserve this species.

• Himalayan black bear versus Bengal tiger at Jigme Dorji National Park, Bhutan