Mean (± s.e.m.) percentage of time mosquitoes spent inside the plume, in the transition zone or outside the plume boundaries as defined for the treatment odor+heat.

n = Number of included flights. Different letters in the same column express significant differences in time spent in the corresponding section for mosquitoes that landed eventually on the source compared to mosquitoes that landed elsewhere on the upwind screen (two tailed t- test with unequal variance (P