Eaglenest Wildlife Sanctuary (also known as Eaglenest or Eagle Nest) is a premier birding paradise in the Eastern Himalayas, located in West Kameng District, Arunachal Pradesh, India. Covering about 217–218 sq km, this protected area spans a dramatic elevation gradient from ~500 m to over 3,200 m, featuring diverse habitats: tropical wet evergreen forests at lower levels, subtropical broadleaved forests, temperate oak-rhododendron woods, bamboo thickets, and coniferous zones higher up. Part of the Kameng Protected Area Complex (near Pakke Tiger Reserve and Sessa Orchid Sanctuary), it was established in 1989 and gained fame after the 2006 discovery of the Bugun Liocichla, a rare endemic bird named after the local Bugun tribe. Renowned as one of Asia’s top birding sites, it boasts nearly 500 bird species (some checklists report 454–537), including many rarities, restricted-range, and threatened species. The sanctuary also supports rich biodiversity with mammals (red panda, clouded leopard), butterflies, and moths. Access involves trekking or driving forest roads; guided tours from Bompu or other camps are essential for sightings.