Figure 2.

Sex imbalance in mosquitoes at altitude and composition of female's gonotrophic states by species (note: taxa with < 4 females of known gonotrophic state are not shown). The expected equal proportion of females and males is denoted by the broken blue line. Note that except unfed females (gray fill color), all other gonotrophic states must have taken at least one blood meal from a vertebrate host prior to their high-altitude flight and hence could be harboring pathogens from that exposure (see text). Numbers on top (black) and bottom (white) of the bars denote available sample sizes to calculate sex and gonotrophic state composition, respectively.