Noble's Helen

The wingspan is 100–120 mm. On the obverse the forewings are black. The hindwings have tails and are black with a large white macule and a red eyespot in the anal angle. On the reverse side the wings are a little lighter, the front wings have a small white macule on the lower edge, the hind wings have a large white macule and a series of orange lunules in the marginal part. The size of the white macules varies greatly depending on the specimen and the season. Caterpillars have a pair of small horns on the head and another pair on the back of the body. Early instar caterpillars are orange-brown and shiny. 4th and 5th instar caterpillars are green with four brown transverse bands, a bulge at the front of the body, and eye-like eyespots on each side to imitate a snake's head.