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Behaviour: The species occurs singly or as small family groups (mother with cubs). Brown bears like to rest during the mid-day hours and hence, feed actively for 1-2 hours before sunrise and again in the late afternoon and evening. Food availability greatly influences the productivity and density of the animals. Thus, in food-rich areas, the individuals are larger and reproduce earlier. The Himalayan brown bears are territorial and the territory size also varies according to food availability. Male territories are larger (as much as 100 km²) and encompass several female territories. From November to May, the species enters a period of semi-hibernation in dug-out dens and rock caves. The hibernation period is intermittent as the animal may occasionally wake up and become active. Mating occurs during May-June when the pair remains together for a couple of weeks and then separate. However, the implantation of fertilized eggs is delayed till October. The cubs are born in January-February when the mother is hibernating. At birth, the cubs are small, almost hairless and completely helpless. By early summer, they are able to leave the cave with their mother in search of food. The cubs remain with the mother for 3-4 years, until she is ready to mate again. Apart from deep growls as a sign of aggression or during the mating season, the animal is generally silent. The Himalayan brown bear is known to be unpredictable and can be aggressive when threatened or when the individual is accompanied by cubs. Although wary of humans in general, the animal is often drawn towards campsites while scavenging for food.
- Diet: Himalayan brown bears are omnivores and their diet varies according to season. In spring and summer, its diet comprises of grass, bulbs, root, and other plants as well as insects and small mammals like rodents and pikas. They may also predate on domestic livestock like goats and sheep, as well as scavenge on carrion. During late summer and autumn the animals come to the lower altitudes and feed on buckwheat and various fruits to accumulate fat for the winter hibernation.
- Reproduction: Mating season: May-June; Birthing season: January-February; Gestation period: 210-240 days; Litter size: 1-2, rarely 3; Sexual Maturity: 4.5 years (both males and females)
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