Relationships between the end of male swarming for Anopheles coluzzii (in VK7) and An. gambiae s.s. (in Soumousso) and environmental conditions. A) Mean ± standard error (s.e.) temperature (solid line, left axis) and humidity (dashed line, right axis) when last male(s) observed swarming, B) light intensity at end of swarming and C) time at which first male(s) observed swarming (solid line) and time of sunset on swarm monitoring days. For each data point n = 20 (for each species, the same five swarm sites monitored on four consecutive days each month).