The males use the flash pattern to attract the attention of the females on the ground. Females have a weaker flash pattern. Fireflies are best seen from half to one hour after sunset in summer on a humid, still, rainless and moonless night. The duration of the flashing display of mass emergence lasts for around 30-45 minutes. There are exceptions and some males persist for longer periods and it's usually these males that are more successful in finding a female.