Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Oak Eggar (Lasiocampa quercus) is a moth of the family Lasiocampidae. It is found in Europe and the British Isles.The wingspan is 45 75 mm. The females are larger than the males. The moth flies from May to September depending on the location. Their hairs can cause a violent itching skin allergy in some people. The larvae feed on Larix, Betula, Salix and Rubus species. A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth (about ten times the number of species of butterfly), with thousands of species yet to be described.