Zygaenid moths are born on the underside of grape leaves. When they are first born they are very sneaky, they only eat the underside of the leaf so you won't know they are there. Another common name for Zygaenid is the Grapeleaf Skeletonizer. After they get a little older they start to live up to their common name and leave behind the skeleton of the leaves they eat.

If Zygaenid Moths pay you a visit you can tell them to leave by either spraying or introducing a virus. They do not take well to being sick and will leave you alone shortly.