Common name: Chinese Three-keeled Pond Turtle
Synonyms and Other Names: Reeve's turtle
available through www.itis.gov
Identification: Three strong keels on the carapace, which is usually brown. The legs are webbed and the tail is quite long. Coloration: body usually grey with yellowish spots and the head has a pattern of stripes. Some Reeve's turtles entire body and soft parts might be dark brown or completely black. Reaches sexual maturity in China at 4 to five inches; grows as large as 14 inches in Japan.
Size: 4-14 inches
Native Range: Mauremys reevesii is native to most of temperate and subtropical China, North Korea and South Korea; populations also occur in Taiwan, Hong Kong and Japan (van Dijk, 2013).
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Mauremys reevesii are found here.
Table last updated 11/29/2023
† Populations may not be currently present.
Means of Introduction: Pet escape or release.
Status: Failed in California, Guam, and Massachusetts.
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
References: (click for full references)
Behler, J.L. and F.W. King. 1979. The Audubon Society Field Guide to North American Reptiles and Amphibians. Alfred A. Knopf, Inc. NY.
Cardoza, J.E., G.S. Jones, T.W. French, and D.B. Halliwell. 1993. Exotic and translocated vertebrates of Massachusetts. Massachusetts Division of Fisheries and Wildlife Fauna of Massachusetts Series, Publication #17223-110-200-11/93-C.R. Volume 6. 95 pp.
Conant, R. and J.T. Collins. 1991. A Field Guide to Reptiles and Amphibians: Eastern and Central North America. Peterson Field Guide Series. Houghton Mifflin Company, Boston. Third ed.
Ernst, C.H., J.E. Lovich, and R.W. Barbour. 1994. Turtles of the United States and Canada. Smithsonian Institution Press, Washington, D.C.
Holland, D.C. - herpetologist, Fallbrook, CA.
Leberer, T. 2003. Records of freshwater turtles on Guam, Mariana Islands. Micronesica 35-36:649-652.
Spinks, P.Q., G.B. Pauly, J.J. Crayon, and H.B. Shaffer. 2003. Survival of the western pond turtle (Emys marmorata) in an urban California environment. Biological Conservation 113(2):257-267.
van Dijk, P.P. 2013. Mauremys reevesii. The IUCN Red List of Threatened Species. Version 2015.2. http://www.iucnredlist.org. Downloaded 23 July 2015.
Pam Fuller, Ann Foster, and Robert S. Powell
Revision Date: 4/19/2018
Pam Fuller, Ann Foster, and Robert S. Powell, 2023, Mauremys reevesii (Gray, 1831): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=1228, Revision Date: 4/19/2018, Access Date: 11/29/2023
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.