Comparison of the timing of onset of general dusk activity for male Anopheles coluzzii and An. gambiae s.s . in an actograph, September–October 2008. Cauchit curve fitted to data points for each species. Each data point indicates the proportion of males active in that minute, with n = six males of each species/night x 21 nights, i.e., 126 males of each species each minute, over 3 hours, i.e., 180 min).