Sexually active male screwworms, Cochliomyia hominivorax (Coquerel), were observed in “waiting stations” from which they darted at any insect flying by. They often returned to the original station or a few cm from it without contacting the intruder. When they did make contact, the encounters were usually characterized by a vigorous wrestling, with the result that the pair of insects fell to the ground and parted. Occasionally, when the encounter involved a female screwworm fly, the pair flew off with the male holding the female's dorsum to a nearby limb where they mated. Males and virgin females were less likely to orient to a host animal than were mated females and were more abundant in vegetation. We suggest that males are more likely to encounter a receptive female from waiting stations in vegetation where both sexes feed on nectar or honeydew, than from those on or near hosts.