The Horse Chestnut Moth (Pachycnemia hippocastanaria) is a geometer moth species with a wingspan of 28-32 mm. Despite its scientific and common names, its larvae feed exclusively on heaths like Heather (Calluna) and Cross-leaved Heath (Erica).
Key Biological and Habitat Facts:
Distribution: Found throughout Europe, it is classified as "Least Concern" but is considered "Nationally Scarce" in certain areas like Britain.
Habitat: Typically thrives in sandy areas, heathlands, moorlands, and pine forests.
Flight Period: Bivoltine, flying in two broods: a primary flight in April and May, and a partial, smaller second brood in August.
Life Cycle: The larvae consume leaves from the Ericaceae family and the species over-winters in the pupal stage.
Identification:The moth is distinct but can easily be mistaken for a micro-moth due to its size and resting posture, though it is technically a macro-moth.The name remains a mystery as the adult moths have absolutely no documented association with Horse Chestnut trees.
