Figure 2. Major modes detected using CLUMPAK for supported partitions based on the results presented in Supplemental Appendix S1 Figure S6. Samples are grouped by country, and locality, except in North America, where for clarity they are grouped by geographic region. Thin dark lines are used to differentiate sample localities, and thick dark lines to separate countries. Countries in the native range of winter moth are ordered roughly from west (left) to east (right).