An extensive survey has shown that the current range of the nutria, Myocastor coypus. in Arkansas should include the West Gulf Coastal Plain, the Mississippi Alluvial Plain (to Missouri) and the Arkansas Valley along the Arkansas River to Oklahoma. The extensive river and creek systems in the state have provided ready avenues for dispersal, allowing for extremely rapid expansion from the early 1960's when nutria were first observed in the southern part of the state. The current range probably represents most of the suitable habitat in the state and it is felt that further expansion will be held to a minimum.
Bailey, Joe W. and Heidt, Gary A.
"Range and Status of the Nutria, Myocastor coypus, in Arkansas,"
Journal of the Arkansas Academy of Science: Vol. 32
, Article 9.
Available at: http://scholarworks.uark.edu/jaas/vol32/iss1/9