Glaw Tuwi, also known as Glaw Lake (located at 27.69N & 96.45E), is a natural freshwater wetland situated at an elevation of 1168m. The footshaped wetland is 18km away from the nearest settlement, Wakro, and has a perimeter of 5.12 km spanning over an area of 128.98 ha. The wetland sustains significant populations of floral species like Dalbergia sissoo, Duabanga grandiflora, Pterospermum acerifolium, Actinodaphne obovate, Adina cordifolia, Ailanthus excelsa, Bombax ceiba, etc and faunal speceis like clouded leopard (Neofelis nebulosa), Eastern hoolock gibbon (Hoolock hoolock), red goral (Naemorhedus baiyell), Asiatic black bear (Ursus thibetanus), golden cat (Catopuma temminckii), and sun bear (Helarctos malayanus). Several of these species are globally threatened, including clouded leopard (VU), Eastern hoolock gibbon (EN), red goral (VU), Asiatic black bear (VU), and sun bear (VU). It is a sacred lake, especially revered by the Mishmi tribe of Arunachal Pradesh. The wetland buffers water received from rainfall and inflowing streams and contributes to the regime of the Kamlang River.

A wetland should be considered internationally important if it contains a representative, rare, or unique example of a natural or near-natural wetland type found within the appropriate biogeographic region.

A wetland should be considered internationally important if it supports vulnerable, endangered, or critically endangered species or threatened ecological communities.

A wetland should be considered internationally important if it supports populations of plant and/or animal species important for maintaining the biological diversity of a particular biogeographic region.

A wetland should be considered internationally important if it supports plant and/or animal species at a critical stage in their life cycles, or provides refuge during adverse conditions.

A wetland should be considered internationally important if it regularly supports 20,000 or more waterbirds.

A wetland should be considered internationally important if it regularly supports 1% of the individuals in a population of one species or subspecies of waterbird.

A wetland should be considered internationally important if it supports a significant proportion of indigenous fish subspecies, species or families, life-history stages, species interactions and/or populations that are representative of wetland benefits and/or values and thereby contributes to global biological diversity.

A wetland should be considered internationally important if it is an important source of food for fishes, spawning ground, nursery and/or migration path on which fish stocks, either within the wetland or elsewhere, depend.

A wetland should be considered internationally important if it regularly supports 1% of the individuals in a population of one species or subspecies of wetland-dependent nonavian animal species.