Location of the study area (box) in Europe and locations of the study sites, Kühkopf (49°49′N, 8°24′E), Waghäusel (49°15′N, 8°31′E), and Weinheim (49°33′N, 8°40′E). For each trapping site, the proportions of collected mosquitoes are given as a pie chart. Mosquitoes that assayed positive for Sindbis virus were exclusively trapped at Weinheim (in bold and underlined).