Synonyms and other taxonomic changes
Explanation of Names
The species name is for its hostplant, Senecio jacobaea, St Jameswort or Tansy Ragwort.
wingspan about 39 mm, based on Moth Photographers Group specimen
Eggs are laid in clusters on the underside of host plant leaves. First instar caterpillars are yellow with a black head, becoming striped in later instars, with broad black and yellow bands. CAterpillars start out feeding on leaves but move to flowers when plant is in bloom.
Moth has dark grey forewings with a distinctive red pattern. Hindwings are red.
Larvae feed on Senecio jacobaea
. HOSTS database
also lists Salt-marsh Fleabane (Pluchea odorata
), Hound's-tongue (Cynoglossum officinale
), Hops (Humulus lupulus
) and Sow Thistle (Sonchus oleraceus
Introduced from Europe in the 1960s as a control for introduced weedy Ragwort, the host plant for its caterpillars, which is toxic to livestock.
Lichen Moths in the genus Hypoprepia: