In the experiments with female models 2 questions were asked, viz. (1) How do perching males, which are oriented in different directions relative to the bank, respond to the females? (2) What is the flight direction chosen by a male after seizure of the female? The majority of perching males (46.5%) are directed towards the bank. Males facing towards the bank or parallel to it responded to the female model more often with tandem reaction than males facing away from the bank. 52% of males flew towards the bank after seizure of the female model. Thus, males which perch facing the water are most likely to fly towards it when in tandem. Nearly 8% of the males which captured female models (n=82) tried to oviposit with them usually after unsuccessful attempts of the male to mate. The results obtained suggest the leading role played by S. sanguineum males in oviposition behaviour.