Aie Valley Forest Division supports diverse wildlife species and an equally diverse habitat. The list of faunal species of Aie Valley Division is appended as Appendix - II. It is evident from Appendix - II that the Division has been a home for large number of faunal species including highly endangered species represented from several faunal groups. The Reserved forest area within the study area has some of the representative habitats for animals listed in the Appendix - II. During the course of survey however not many species of terrestrial wild animals could be sighted. Heavy biotic interference, incidences of fire and political insurgency in the area have had widespread implications on the overall integrity of the ecosystem. Poor regeneration of sal and associate species and grazing pressure have led to the decline of the habitat potential of these Reserved Forest patch in general. Extremely low siting of the animals during the field work could also be attributed to very small areas of forest actually falling within the study area that has been surveyed during the course of study.

Moist deciduous forest make up ideal habitat for many wildlife species. Reserved Forests of Kakoijana, Nakatti hills and Bhumeshwar hills form important habitats for many forest dwelling species including Golden langur (Trachypithecus geei), Pangolin (Manis crassicaudata), Python (Python molurus molurus), Barking deer (Muntiacus muntjak), Hog deer (Axis porcinus), Wild boar (Sus scrofa) and species of primates, tortoise and turtles. The Kakoijana Reserved Forest has a special significance as a wildlife habitat as it has been the only forest patch within the study zone to harbour troops of Golden langur (Trachypithecus geei) (Plate 1). At least 5 troops of Golden langur (Trachypithecus geei) are reported from this area (Srivastava, 1996). The state of Assam has 10 of the 15 species of primates found in India. Golden langur (Trachypithecus geei) is one of the nine primates that are endangered. This Reserved Forest is the only habitat for this species outside its range of reported distribution in Manas Tiger Reserve and Reserved Forests of Kokrajhar district (Choudhary, 1989 and Srivastava, 1996). The potential of this small patch of isolated Reserved Forests to provide the habitat requisites for Golden langur (Trachypithecus geei) has fairly enhanced the ecological significance of this area.