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Brimstone moth - Opisthograptis luteolata - Family: Geometridae Brimstone moth - Opisthograptis luteolata© Rob Wolton/English Nature ![]() Brimstone moths are bright yellow with orange patches on the front of their forewings. Although this vivid colour and pattern make the moth obvious to the keen-eyed observer, they combine to create a cryptic effect that allows the moth to hide effectively from its predators during the daytime hours. The adults can be seen from April to September, flying mostly during dusk and the early part of the night. Smooth green-brown twig-like caterpillars are seen from June to October. In southern Britain the brimstone moth produces a second brood in August but there is just a single brood in the north, in June. These moths are generally distributed and very common in a variety of habitats. FoodHawthorn (Crataegus monogyna), blackthorn (Prunus spinosa), honeysuckle (Lonicera periclymenum) , rowan (Sorbus aucuparia), plum (Prunus domestica) and willows (Salix sp.) PlantsBlackthorn, Crack willow, Goat willow, Hawthorn, Honeysuckle, Purple willow |