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Location where to get the Complete Article --> Vol 4, No 1 (2017): 57-61

ISSN- 2348-5191 (Print version); 2348-8980 (Online)

Indian Giant Squirrel (Ratufa indica) Distribution pattern, Habitat Structure and Characteristics in the Grizzled Giant Squirrel Wildlife Sanctuary, Srivilliputhur, Tamil Nadu, India

Naresh Baja, Ambalavanan Sankari, Nagarajan Baskaran, Rajarathinavelu Nagarajan, Murali Saravanan


An attempt has been made to study the distribution pattern and habitat characteristics of the Indian Giant Squirrel (Ratufa indica) at Grizzled Giant Squirrel Wildlife Sanctuary, which is a part of the Periyar-Agasthyamalai landscape of Southern Western Ghats, Tamil Nadu, Southern India. The study results revealed that the R.indica is widely distributed in moist deciduous forest followed by evergreen forest and not located in dry thorn forest habitat. Among the 17 habitat variables studied, 14 variables were significantly higher in R. indica distribution area than those in the non-distribution area. Tree species density and GBH were significantly higher in R.indica distribution area (density: 442±13.12, GBH = 81±1.56) than that of non-distribution area (density: 318±6.3, GBH: 57±0.68) (density: t –test, df = 153, P < 0.05 and GBH: t = -7.27, df = 169, p<0.05). The present distribution pattern and habitat characteristics of R. indica in the area provides baseline data for future studies. The study is also addressed the issue of an urgent need of survey the status, distribution, abundance and habitat utilization patterns of R.indica in the studied area.


  • Baskaran, N., Venkatesan, S., Mani, J., Srivastava, S.K. & Desai, A. (2011): Some aspects of the ecology of Indian Giant Squirrel (Ratufa indica Erxleben, 1777) in the tropical forests of Mudumalai Wildlife Sanctuary, southern India and their conservation implications. J. Thr. Taxa., 3(7):1899-1908.
  • Borges, R.M., Mali, S. & Ranganathan, S. (1992): The status, ecology and conservation of the Indian Giant Squirrel (Ratufa indica). Draft Technical Report No.1 (submitted to Wildlife Institute of India). Indo-US Project.
  • Borges, R. (1989): Resource heterogeneity and the foraging ecology of the Malabar Giant Squirrel (Ratufa indica). PhD Thesis, University of Miami, Florida.
  • Burnham, K.P., Anderson, D.R. & Laake, L.L. (1980): Estimation of density from line transects sampling of biological population. Wildlife Monographs. 72 (1): 202.
  • Ceballos, G. & Ehrlich, P.R. (2002): Mammal population losses and the extinction crisis. Science, 296: 904-907.
  • Datta, A. & Goyal, S.P. (1996): Comparison of forest structure and use by the Indian Giant Squirrel (Ratufa indica) in two riverine forests of Central India. Biotropica, 28(3): 394-399.
  • Desai, A.A., Baskaran, N., Venkatesan, S. & Mani, J. (1999): Ecology of Malabar Giant Squirrel (Ratufa indica) in Mudumalai Wildlife Sanctuary and Natinal parks. Technical Report. Bombay Natural History society and Tamilnadu Forest Department.
  • Gurnell, J. (1987): The Natural History of Squirrels, (Natural History Series). Pub. by: Facts on File, New York.
  • Lemos de Sa, R.M. & Strier, K.B. (1992): A preliminary comparison of forest structure and use by two isolated groups of woolly spider monkeys, brachyteles, arachnoides.Biotropica, 24:455-459.
  • Linderman, M.A., An, L., Bearer, S., He, G., Ouyang, Z and Liu, J. (2006), Interactive effects of natural and human disturbances on vegetation dynamics across landscapes. Ecol. Appl., 16(2): 452-463.
  • Nandini, R. & Parthasarathy, N. (2008): Food habits of the Indian giant flying squirrel (Petaurista philippensis) in a rain forest fragment, Western Ghats. J. Mamm., 89(6):1550-1556.
  • Ramachandran, K.K. (1992): Certain aspects of ecology and behaviour of Malabar Giant Squirrel Ratufa indica (Schreber). PhD Thesis. Department of Zoology, University of Kerala, 191 pp.
  • Ramachandran, K.K. (1988): Ecology and behaviour of Malabar Giant Squirrel Ratufa indica maxima (Schreber) 1788. Report of the Project Wild 04/83. Division of Wildlife Biology, Kerala Forest Research Institute, Peechi, Kerala, 47 pp.
  • Rout, S.D. & Swain, D. (2005): Status of Giant Squirrel (Ratfa indica) in Similipal Tiger Reserve, Orissa, India. Ind. Forest., 131(10): 1363-1372.
  • Steele, M.A. & Koprowski, J.L. (2001): North American Tree Squirrels, Smithsonian Institution. Pub. by: Smithsonian Books , Washington DC.
  • Smith, W.P., Gende, S. & Nichols, J.V. (2005): The northern flying squirrel as an indicator species of temperate rain forest: Test of an hypothesis. Ecol. Appl., 15: 689-700.
  • Thorington, R.W. & Cifelli, R.L. (1989): The usual significance of the giant squirrels (Ratufa), pp. 212219. In: Daniel, J. C. and J. S. Serrao (eds.). Conservation in Developing Countries: Problem and Prospects. Proceeding of the Centenary Seminar of the Bombay Natural History Society. Oxford University Press.
  • Verbeylen, G., Wauters, L.A., De bruyn, L. & Matthysen, E. (2009): Woodland Fragmentation affects space use of Eurasian red squirrels. Acta Oecol., 35: 94-103.

  • DOI:10.21276/ambi.2017.04.1.Ra01>

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