Caterpillars munch on:
Adults take nectar from the flowers of English Ivy and also like to feed on overripe berries.
In the autumn, the female moths lay their eggs on the branches and the bark of Oak trees. The eggs will stay through the winter, until caterpillars hatch out the following spring.
There is even more about this species on the main Butterfly Conservation website
Merveille du Jour means “Wonder of the Day” in French. These moths rest on lichen during the day, perfectly camouflaged by the beautiful pattern on their wings.