Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Juniper Ermine Moth (Argyresthia trifasciata) is a moth of the family Yponomeutidae. It is found in great parts of Europe, but originates from the Alps. The wingspan is 7-10 mm. The moth flies from May to September.The larvae feed on Juniperus communis, Thuja, Chamaecyparis and Leylandcipres.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.