A male gypsy moth can get attracted by the scent of a female moth 11 kilometers away!

At such a distance, one cubic meter of air may contain just one molecule of the scent. The male moth

detects the scent through its feathery antennae.

By comparing the scent reaching the two antennae it can zero in on the female. Female moths have the

scent producing gland at the end of their abdomen.

Virgin moths can send out strong alluring scents. it is so very powerful that a male moth can be

attracted to an empty box which has once lodged a female virgin moth.