Rare immigrant from southern Europe, appearing in southern England. In Hampshire and on the Isle of Wight first recorded at Lepe on the mainland in October 2006 and at Ventnor on the Island in September 2008. From 2015 it has been reported annually, particularly on the island, and 2021 saw a record 42 individuals.
Wingspan 34-37 mm. Resembles Flame Shoulder O. plecta
but the forewings are proportionately longer and paler than in O. plecta
with an indistinct line of subterminal spots. O. leucogaster
has smaller orbicular and reniform stigmata, straighter and more compact 'flame shoulder' running along the upper edge of the forewing to just beyond the reniform stigma, much purer white and larger hindwings with a whitish fringe. The deeply coloured maroon metathorax contrasts sharply with the silky white hairs which cover the anterior abdominal segments and contrast strongly with the dark red thoracic hairs. The abdomen itself is very pale brown, unlike the darker earth-brown colour of O. plecta
(MBGBI Vol 9). Larva feeds on Common Bird's-foot Trefoil, no evidence of breeding in the UK.