FIG. 5 in Mating behaviour of Staminodeus vectoris (Coleoptera: Curculionidae), and the value of systematics in behavioural studies

FIG. 5. Males of S. vectoris, conflict behaviour; dotted lines indicate alternative positions of body parts during sequence of movement, arrows indicate directions of movements: (a) intimidation behaviour, two males are opposed on staminode, their abdomens moving horizontally; (b) fighting behaviour, two males execute fast blows with their prothoracic legs, sustained by prothoracic movements, until their protibiae cling (dotted ring) and dislodge inferior male.