FIGURE 1.

Sample sites of the present study and invasion history of Aedes aegypti with regards to historical presence records. This figure does not necessarily reflect the actual date of invasion, but provides an overview based on some of the first records of Ae. aegypti in the study region (1880–1940). Circles indicate occurrence records and are colour‐coded based on timing (corresponding to the timeline [left]). Black triangles represent sample sites in the present study (refer to Table 1 for population names; Tucson, Arizona population excluded from the figure). The yellow‐shaded area represents an early distribution map of Ae. aegypti by Theobald (1911) which has been modified slightly to fit the current map and to correct Australian records from Southern Australia (which were unreliable: see Lee et al., 1980). Dashed dark grey lines show major shipping routes as a result of the opening of the Suez and Panama canals, while lighter grey lines show the density of shipping movements between 1784 and 1863 (US Maury Collection; modified from Ben Schmidt). For plotted records see Table S1.