Cydalima perspectalis or the box tree moth is a species of moth of the family Crambidae, first described by Francis Walker, the English entomologist, in 1859. Native to Japan, China, Taiwan, Korea, far-east Russia and India, it has invaded Europe; first recorded in Germany in 2006, then Switzerland and the Netherlands in 2007, Great Britain in 2008, France and Austria in 2009, Hungary in 2011, then Romania, and Spain. It has been seen in Slovakia, Belgium and Croatia.

It was during preparations for the 2014 Winter Olympics in 2012, that it was introduced from Italy to Sochi, European Russia, with the planting stock of Buxus sempervirens. The following year it defoliated Buxus colchica in large quantities.

It was recorded in Ontario, Canada in August 2018 and in the eastern United States in May 2021.

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