Colostygia turbata

Colostygia turbata is a moth of the family Geometridae with a wide but patchy range, from the mountains of Europe east to the Altai and the Kamchatka Peninsula, and also in Canada. The wingspan is 24 to 27 millimetres, and the adults are on the wing in June and July. The larvae feed on Galium palustre, are found in the same two months and pass the winter in the larval stage. Five subspecies are listed: the nominate form of the Alps and south-eastern Europe, fuscolimbata of northern Europe, pyrenaearia of the Pyrenees, altaicata of the Altai, the Sayan Mountains, Buryatia and Kamchatka, and circumvallaria of Canada.