Innerline, Katakal and Barak Reserve Forests

Country/territory: India

IBA criteria met: A1 (2004)
For more information about IBA criteria, please click here

Area: 130,000 ha

Bombay Natural History Society
IBA conservation status
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2003 not assessed high not assessed
For more information about IBA monitoring, please click here

Site description (2004 baseline)
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.

Key biodiversity

AVIFAUNA: So far, about 250 species have been listed, including many endangered ones (A. U. Choudhury pers. comm. 2003). The Whitewinged Duck Cairina scutulata is still sporadically recorded, but there is no recent report of the Masked Finfoot Heliopais personata. There are specimens of this elusive bird in American Museums, collected from the northern edge of Innerline RF (BirdLife International 2001). The Spot-billed Pelican Pelecanus philippensis was also recorded from the fringe of Katakhal RF, but there is no recent report. The Swamp Francolin Francolinus gularis has perhaps vanished from the area due to encroachment on its grassland habitat for cultivation, while the last confirmed record of the Green Peafowl Pavo muticus in Assam was from Barak RF (Choudhury 2000). The site lies in Biome-9 (Indo-Chinese Tropical Moist Forest). Some of the major species of the biome that are seen here are Lesser Necklaced Laughingthrush Garrulax monileger, Blackgorgeted Laughingthrush G. pectoralis, and Rufous-necked Laughingthrush G. ruficollis. During winter, many birds of other biomes such as Biome-7 (Sino- Himalayan Temperate Forest) and Biome-8 (Sino-Himalayan Subtropical Forest) move in. Notable forest birds are Grey-bellied Tesia T. cyaniventer, Blyth’s Kingfisher Alcedo hercules, Bluethroated Barbet Megalaima asiatica, Bay Woodpecker Blythipicus pyrrhotis, Maroon Oriole Oriolus traillii, Black-naped Oriole O. tenuirostris, Grey Treepie Dendrocitta formosae, Black-winged Cuckoo Shrike Coracina melaschistos, Short-billed Minivet Pericrocotus brevirostris, White-throated Bulbul Alophoixus flaveolus, Black Bulbul Hypsipetes leucocephalus and Grey Peacock Pheasant Polyplectron bicalcaratum.

OTHER KEY FAUNA: This IBA site has the highest primate diversity in Assam with eight species (Choudhury 1989). They are the Slow Loris Nycticebus coucang, Rhesus Macaque Macaca mulatta, Pig-tailed Macaque M. nemestrina, Stump-tailed Macaque Macaca arctoides, Assamese Macaque M. assamensis, Capped Langur Trachypithecus pileatus, Phayre’s Leaf Monkey T. phayrei and Hoolock Gibbon Hylobates hoolock. Other fauna includes Elephant Elephas maximus, Sloth Bear Melursus ursinus, Malayan Sun Bear Helarctos malayanus, Tiger Panthera tigris, Leopard P. pardus, Clouded Leopard Neofelis nebulosa, Sambar Cervus unicolor, Hog Deer Axis porcinus, Barking Deer Muntiacus muntjak, Serow Nemorhaedus sumatraensis and Gaur Bos frontalis. The Gangetic dolphin Plantanista gangetica occurs in Barak River and during monsoon in Dhaleswari and Katakhal rivers also. There are historic records of the Sumatran Rhinoceros Dicerorhinus sumatrensis and Wild Water Buffalo Bubalus arnee (= bubalis) (Choudhury 1997, 2001). Among reptiles, there were innumerable past records of the Gharial Gavialis gangeticus.

Turtles recorded include the Keeled Box Turtle Pyxidea mouhotii and Eastern Hill or Asian Brown Tortoise Manouria emys. Both Indian Rock and Reticulated pythons (Python molurus and P. reticulatus) have been recorded here, besides the King Cobra Ophiophagus hannah and other snakes.

Key contributor: Anwaruddin Choudhury.

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Innerline, Katakal and Barak Reserve Forests. Downloaded from on 23/02/2024.