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Fox Moth Macrothylacia rubi Wingspan 40-60mm. A broad-winged moth. Males fly from late afternoon onwards, females are nocturnal. Adult has rounded wings with two pale, waved crossbands; male is reddish-brown, female is greyish-brown. Larva is large, with black and golden hairs; feeds on Heather and Bramble. Widespread in western and northern Britain; much more local elsewhere.