Global Range: The gypsy moth is native to a vast area of Eurasia. The established North American population originated from near Paris, France. Introduction was at Medford, Massachusetts in 1869 (Ferguson, 1978). The North American range expands annually and maps showing generally infested areas are usually readily available from USFS. A map in Appendix G of the 1995 FEIS shows the predicted range as of 2010 within the USA to extend from northeastern South Carolina across eastern Kentucky and much of Indiana into eastern Illinois and eastern Wisconsin. If anything the advance may be running ahead of prediction at least northward. Spot introductions by human transport can occur almost anywhere in temperate North America. The eventual range of the gypsy moth in North America will almost certainly be all climatically suitable forested regions of southern Canada and virtually the entire eastern and central USA and probably much of the West.
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