Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Beech-green Carpet (Colostygia olivata) is a moth of the Geometridae family. It is found in most of Europe.The wingspan is 22-27 mm. Adults are in wing from May to August in one generation. The larva feed on Galium species. Larvae can be found from September to May. 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.