The male scaly cricket Ornebius aperta from Australia can copulate more than 50 times in three to four hours, all with the same female.
Studies reveal that each time a male mates, a bag of sperm is placed on the female which she immediately eats. The sperm is an extremely nutritious food for the female cricket which is why she devours it so eagerly. By comparison, female chimpanzees have been recorded copulating with eight different males in 15 minutes. A lioness in heat has sex once every half an hour for four or five days/nights.
Comments below may relate to previous holders of this record.