The caterpillar of this moth is sometimes
found in gardens on Barberry, though the two eggs illustrated here, measuring
0.71 mm x 0.51 mm, were found on the underside of a leaf of the related Oregon
Grape, Mahonia aquifolium, on May 16, 2005. The caterpillars hatched
the following day, and grew astonishingly quickly, the adult moths emerging
on June 15 and 16, a bare month later.