Mega village is 40 km from Along district headquarters on the Along-Mechuka road. Moyo is 25 km from Mega village and Dipu is 18 km from Molo. The Siyom River joins these villages and Molo village is situated at the conjuncture of the Siyom and Sike rivers.
Topographically, this area is largely hilly and rugged, with some parts of the undulating mountainous terrain having a steep drop to the river. The community-protected forests are dense primary forests largely comprising sub-tropical evergreen forest species, with the presence of some components of tropical forest. Some of the cane species endemic to this general region and found in these forests include Calamus arunachalensis and Calamus khasiana. Some of the dominant floral species found in these forests are Actinodaphne obovata, dhup, dhale katus, bastard cedar, dalchini, thanet, mewa or mauwa, khewanua, Lindera sp., kusavithagari, Phoebe sp., ar kanla, East Indian almond, Vitex sp., rasamala, Cinnamomum spp., oak spp., hairy mountain fig, orchid, avocado. Bamboo and cane species found here include rawthing or giant bamboo, Calamus arunachalensis, Calamus flagellum, Calamus inermis, takhe-tikhe, phulrua or red bamboo, and chal.
Some common species of mammals found here include barking deer, civet, Assamese macaque, tiger, leopard, jungle cat, fishing cat, common mongoose, smooth otter, yellow-throated martin, tree shrew, and hoary-bellied Himalayan squirrel. Avifauna species seen in this area include Kalij pheasant, rufous-necked hornbill, pompadour green pigeon, pin-tailed green pigeon, common snipe, common sandpiper, white-rumped vulture, crested serpent eagle, harrier, sparrow hawk, common kestrel, and greater racket-tailed drongo. The Siang River Valley in Arunachal Pradesh is also one of the two important corridors of Indian migratory raptors.