Another method of collecting is to make a mixture of beer and brown sugar. I add brown sugar to a can of beer till it makes a thin paste. This mixture should be made a couple of days before using and let set outside to ferment. The mixture is then spread on trees using a paint brush. I like to paint about a dozen trees along a trail. You need to mark the trees so that they can be found after dark. Moths are attracted to the mixture and can be collected after dark. Be very quiet when approaching the trees as the moths can be skittish. I like to put a piece of red cellophane over the flashlight as this red light doesn't spook the moths as much.