The Vietnam mouse-deer (Tragulus versicolor), first described in 1910 by Thomas, also known as the silver-backed chevrotain, is a species of even-toed ungulate in the family Tragulidae that at present is only known from Vietnam. It is the world's smallest ungulate, or hoofed animal.
Until 2004, it was generally treated as a subspecies of the greater mouse-deer (T. napu), though it more closely resembles the lesser mouse-deer (T. kanchil). Recent records of this very poorly known species are sparse, but this is more likely due to the difficulty involved in separating it from other mouse-deer and the general absence of field work within its presumed range than it being extinct.
The Vietnam mouse-deer is among the 25 “most wanted lost” species that are the focus of Global Wildlife Conservation's Search for Lost Species initiative. In November 2019 it was reported that a team of scientists had successfully photographed the mouse-deer in a Vietnamese forest for the first time in 30 years.
- Wilson, D.E.; Reeder, D.M., eds. (2005). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. ISBN 978-0-8018-8221-0. OCLC 62265494.
- Timmins, R.J.; Duckworth, J.W. & Meijaard, E. (2008). "Tragulus versicolor". IUCN Red List of Threatened Species. Version 2008. International Union for Conservation of Nature. Retrieved 29 March 2009. Database entry includes a brief justification of why this species is of data deficient.
- Thomas, Oldfield (1910), "Tragulus versicolor", The Annals and Magazine of Natural History, 8, 5 (25–30): 535
- Sample, Ian (11 November 2019). "Mouse deer species not seen for nearly 30 years is found alive in Vietnam". The Guardian. ISSN 0261-3077. Retrieved 11 November 2019.
- Meijaard, Erik; Groves, C.P. (2004). "A taxonomic revision of the Tragulus mouse-deer (Artiodactyla)" (PDF). Zoological Journal of the Linnean Society. 140 (1): 63–102. doi:10.1111/j.1096-3642.2004.00091.x.
- "The Search for Lost Species". Global Wildlife Conservation. Retrieved 10 July 2017.
- Chappell, Bill (11 November 2019). "Silver-backed chevrotain, with fangs and hooves, photographed in wild for first time". NPR. Retrieved 12 November 2019.
- Nguyen, An; Tran, Van Bang; Hoang, Duc Minh; Minh Nguyen, Thi Anh; Nguyen, Dinh Thang; Tran, Van Tiep; Long, Barney; Meijaard, Erik; Holland, Jeff; Wilting, Andreas; Tilker, Andrew (11 November 2019). "Camera-trap evidence that the silver-backed chevrotain Tragulus versicolor remains in the wild in Vietnam". Nature. 3 (12): 1650–1654. doi:10.1038/s41559-019-1027-7. PMID 31712696.