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Location India, Assam
Central coordinates 92o 30.07' East  24o 10.85' North
IBA criteria A1
Area 130,000 ha
Altitude 50 - 600m
Year of IBA assessment 2004

Bombay Natural History Society

Site description This site covers parts of Cachar and Hailakandi districts in southern Assam, bordering Mizoram and Manipur. The Innerline Reserve Forest (RF) is the largest RF in Assam, with an area of more than 110,000 ha. Katakhal and Barak RFs are contiguous with Innerline. The area is mainly composed of low hills that are the northern promontories of the Lushai or Mizo Hills. Small patches of plain area found between the hills are mostly under human habitation. Dhaleswari, Barak and Sonai are the main rivers. These reserve forests, along with some other adjacent reserve forests, were proposed as Dhaleswari Wildlife Sanctuary in the early 1980s. The area has a rich diversity of mammals and birds (Choudhury 1983). Part of Katakhal RF has been ornithologically surveyed as far back as the 19th century (Inglis 1896-1910). The forests are mainly Tropical Wet Evergreen and Tropical Semievergreen. The two characteristic tree species of the area are Dipterocarpus turbinatus and Palaquium polyanthum. There are vast and continuous stretches of bamboo with cane and reeds. There are some small but excellent patches of tropical rain forest on the plains in the Innerline RF.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Swamp Francolin Francolinus gularis resident  2004  present  A1  Vulnerable 
Green Peafowl Pavo muticus resident  2004  present  A1  Endangered 
White-winged Duck Asarcornis scutulata resident  2004  present  A1  Endangered 
Lesser Adjutant Leptoptilos javanicus resident  2004  present  A1  Vulnerable 
Spot-billed Pelican Pelecanus philippensis resident  2004  present  A1  Near Threatened 
White-rumped Vulture Gyps bengalensis non-breeding  2004  present  A1  Critically Endangered 
Slender-billed Vulture Gyps tenuirostris non-breeding  2004  present  A1  Critically Endangered 
Masked Finfoot Heliopais personatus resident  2004  present  A1  Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Inner-Line Forest Sanctuary 10,000 unknown 0  


IUCN habitat Habitat detail Extent (% of site)
Forest   -
Wetlands (inland)   -
Artificial - terrestrial   -

Land use

Land-use Extent (% of site)
agriculture -
Notes: Agriculture; Jhum cultivation
forestry -
Notes: Forest

Acknowledgements Key contributor: Anwaruddin Choudhury.


BirdLife International (2001) Threatened Birds of Asia: The BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

BirdLife International (undated) Important Bird Areas (IBAs) in Asia: Project briefing book. BirdLife International, Cambridge, U.K., Unpublished.

Champion, H. G. and Seth, S. K. (1968) A revised survey of forest types of India, Govt. of India Press, Delhi. Pp 403.

Choudhury, A. U. (1983) Plea for a new wildlife refuge in eastern India. Tigerpaper 10(4): 12-15. Bangkok.

Choudhury, A. U. (1989) Primates of Assam: their distribution, habitat and status. Ph.D. thesis. Gauhati University, Guwahati.

Choudhury, A. U. (1993) Potential Biosphere Reserves in Assam (India). Tigerpaper 20 (1): 2-8.

Choudhury, A. U. (1997) The status of the Sumatran rhinoceros in northeastern India. Oryx, 31(2):151-152.

Choudhury, A. U. (2000) Birds of Assam. Gibbon Books & WWF-India NE Region, Guwahati. Pp. 16-17, 34.

Choudhury, A. U. (2001) On the occurrence of the wild water buffalo Bubalus arnee in the Barak Valley districts of Assam. J. Bombay Nat. Hist. Soc. 98(2): 270-271.

Inglis, C. (1896-1910) List of birds collected during 5 years’ residence in Hylakandy district of Cachar, 8 parts. J. Bombay Nat. Hist. Soc. Vols. 10-13.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Innerline, Katakal and Barak Reserve Forests. Downloaded from on 25/10/2014

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