70.301 Essex Emerald Copyright Martin Evans
 Distribution map Copyright Martin Evans
 Life stages table Copyright Martin Evans  70.301 Essex Emerald Copyright Martin Evans


70.301 Essex Emerald Thetidia smaragdaria maritima (Prout, 1835)


Similar species: With its prominent white spot in the forewing, usually strong central cross-lines (the inner one having a double outward loop) and its saltmarsh habitat, this moth is unlikely to be mistaken for any other British or Irish species.

Forewing: 14 to 17mm

Habitats: Previously found in upper salt-marsh in Essex and Kent.

Habits: Larvae of this species were last recorded in Kent in April 1991. The moth comes to light.

Foodplant: The larva feeds on Sea Wormwood. In captivity it accepts Wormwood and Southernwood. It pupates in a flimsy cocoon attached to a vertical stem.