Head and body length is 16-17cm. Tail is 20-22cm. Grayish brown with a reddish tinge dorsally, darkest along back. Underparts gray grading into whitish. Chin and upper throat white. Tail blackish brown with fine dark hairs. Long, shiny black whiskers. Fur soft and long, up to 45mm in length in back. Feet covered with short hairs.
- de A. Goonatilake, W.I.L.D.P.T.S. & Molur, S. 2008. Rattus montanus. 2009 IUCN Red List of Threatened Species. Downloaded on 6 October 2009.
- Musser, G. G.; Carleton, M. D. (2005). "Superfamily Muroidea". In Wilson, D. E.; Reeder, D. M. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. pp. 894–1531. ISBN 978-0-8018-8221-0. OCLC 62265494.
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