Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Rannoch Looper (Macaria brunneata) is a moth of the family Geometridae. It is found throughout Europe.The wingspan is 25 30 mm. The length of the forewings is 11 13 mm. The moth flies from June to July. The caterpillars feed on bilberry.The geometer moths or Geometridae are a family of the order Lepidoptera. A very large family, it has around 35,000 species of moths described, and over 1,400 species from 6 subclasses indigenous to North America).