Coprosma Hawk Moth
(erroneously: Sphinx ardenia)
MACROGLOSSINAE, SPHINGIDAE, BOMBYCOIDEA
This is a beautiful and interesting Caterpillar. When young, it is translucent green with a black horn on its tail and a yellowish head. It rests lying along a vein on the underside of a leaf. Later, it becomes an opaque green with two yellow stripes running the length of its body. Its head, which is light blue, is only half the width of its body. The tail horn becomes blue and wicked-looking. The horn is in fact quite harmless. It may frighten predators or draw their attention from the less significant head end.
When disturbed, the Caterpillar lashes its head violently from side to side. When mature, the caterpillar grows to a length of about 6 cms. At its last moult, its coloration changes to diagonal patches of light and dark brown, which blend in well with the patches of light and shade on its food plant. Uniquely amongst the SPHINGIDAE caterpillars, the diagonals slope downward and backward when viewed from the side.
It feeds on various plants from the plant family RUBIACEAE including :
The caterpillars pupate on the surface of the soil under a mat of felt that they spin amongst dead leaves. Before pupating they wander around in their jar for a day or so. The pupa takes about four days to form. It has an exquisite pattern of light and dark brown markings corresponding to the organs of the maturing moth inside. Our specimens have taken from seven to thirteen weeks for metamorphosis.
The moth itself is a handsome dark brown, with white edges to the wings and white bars across the wings and abdomen. It normally rests with these white bars aligned on each side to form a single stripe across the moth. This may give effective camouflage, misleading the eye to see the front and back as separate entities, neither of which is especially shaped like a moth.
The underside of the moth has tufts of bright red hair. Also the ends of the white bar show as transparent windows on the wings. The adult moth has a wingspan of about 6 cms.
The eggs are smooth, white and oval, and have a diameter about 0.5 mm. They are laid singly or in pairs on the edge of a leaf of the foodplant.
This specieshas been found occasionally in
but occurs over the eastern coastal region of Australia, including
Further reading :
Butterflies and Moths,
Collins Eyewitness Handbooks, Sydney 1992, p. 242.
Ian F.B. Common,
Moths of Australia,
Melbourne University Press, 1990, pl. 16.12, p. 413.
John William Lewin,
Natural History of Lepidopterous Insects of New South Wales,
London : T. Bensley (1805), p. 3, and also Plate 2.
Moths of Victoria - Part 1,
Silk Moths and Allies - BOMBYCOIDEA,
Entomological Society of Victoria, 2008, pp. 28-31.
Tropical Queensland Wildlife from Dusk to Dawn Science and Art,
LeapFrogOz, Kuranda, 2015, p. 197.
Paul Zborowski and Ted Edwards,
A Guide to Australian Moths,
CSIRO Publishing, 2007, p. 170.
(updated 29 April 2011, 1 April 2014)