Fig. 1.

Mating systems of sexually mature, transient (gregarious-behaving) desert locust adults. (A) Nongravid females outside a lek. (B) Males aggregating on the hot ground (lek) and waiting for incoming gravid females during the day, (C) by raising their bodies off the ground and orienting the body axis parallel to the sunrays. (D) Males approaching an incoming female (black arrow) and fighting for possession of the female at the onset of pairing. (E) Mating pairs tended to move to the shade at midday and (F) to aggregate near leks near dusk. (G) Group oviposition after dusk.