Abstract
Insects display a wide variety of sexual dimorphism including size, ornamentation and colouration. For example, in species for which males fight one another for access to mates and fitness, males have enlarged weapon traits for fighting. In species for which males exhibit colorful ornamentation, more colourful males are preferred by females. In addition, insects often show sex differences in leg morphology, with males possessing longer or thicker developed legs. These structures are notable because of the exaggerated length or thickness. The developed legs of males are thought to function in male-male competition and copulation with females. Legs are important for reproduction not only in males but also in females, who often use their legs to resist sexual harassment by males. Thus, the legs of insects play a key role in reproduction regardless of sex. Here, we summarise our research and discuss the influence of legs on reproduction in insects.
