The dark brown adults of this species have bright orange hindwings. They closely resemble a hummingbird in flight and when hovering at a flower. Unlike most hawk-moths, this is a day-flying species and is usually seen visiting flowers in sunshine.
Pupates close to the ground in leaf litter or in the leaves of the food plant.
Recorded in 136 (50.4%) of the 270 2km squares of Huntingdonshire.
Last recorded in October 2020
Recorded date range (Adult): 19 January to 20 December
Recorded date range (Larva/Leafmine): 15 August to 15 August