Pachycnemia hippocastanaria (Horse Chestnut Moth) is a small geometrid moth with a 28–32 mm wingspan, appearing in grey, brown, and red tones. Native to European heathlands, it has two broods (April-May, August) and feeds on Heather (Calluna vulgaris), not Horse Chestnut trees. It is distinct from the invasive Horse Chestnut Leaf Miner (Cameraria ohridella).
Key Facts about Pachycnemia hippocastanaria
Appearance: A relatively small, slender-bodied moth with a wingspan of 28–32 mm. The forewings are typically a mixture of grey, brown, and reddish tones with darker markings.
Habitat: Primarily found in warm, dry, open habitats such as heathlands.
Distribution: A southern species in Britain, restricted to heathlands in the southernmost counties. It is also found in various parts of Europe.
Life Cycle: It is double-brooded, with adults appearing in April and May, and a second, sometimes smaller brood appearing in August.
Larval Foodplant: Contrary to its name, the larvae feed on heathland plants, specifically Heather (Calluna vulgaris) and Cross-leaved Heath (Erica tetralix).
Behaviour: Both males and females are attracted to light.
