Moths & butterflies known to feed on hare's-tail cottongrass (Eriophorum vaginatum):

Species Status Match
Large heath
Coenonympha tullia
Vulnerable this species
Rosy marsh moth
Coenophila subrosea
Near Threatened any Eriophorum species
Antler moth
Cerapteryx graminis
LC this species
Small wainscot
Denticucullus pygmina
LC any Eriophorum species

Host-plant data: Cook et al. (2025), Traits data for the butterflies and macro-moths of Great Britain and Ireland, 2024, UK Centre for Ecology & Hydrology / Butterfly Conservation; and Padovani et al. (2020), Database of Insects and their Food Plants (DBIF), UK Centre for Ecology & Hydrology (both Open Government Licence). Contains data supplied by UK Centre for Ecology & Hydrology.