Assam, Arunachal Pradesh, Sikkim and some areas of West Bengal come under this biodiversity hotspot The Himachal mountain range is well endowed with biodiversity. This hotspot is spread over $$750,000$$ square km. There are about $$10,000$$ species, out of which $$3,160$$ are endemic species. Some important animals found in this region are. Himalayan Tahr, Golden Langur, Hoolock Gibbon, Pigmy Hog, Flying Squirrel, Snow Leopard, Takin, Gangetic Dolphin, etc.