Theretra oldenlandiae (Fabricius, 1775)
(one synonym : Deilephila argentata)
Impatiens Hawk Moth
MACROGLOSSINAE, SPHINGIDAE

Don Herbison-Evans ( donherbisonevans@yahoo.com )
&
Stella Crossley

(updated 19 July 2011)

Theretra oldenlandiae
young instars
(Photo: courtesy of Jan MacDonald, Mackay)

These Caterpillars can sometimes be a pest on :

  • Busy Lizzie ( Impatiens wallerana, BALSAMINACEAE ), and
  • Fuchsias ( Fuchsia species, ONAGRACEAE ),

    Theretra oldenlandiae
    (Photo: courtesy of Michael Manning)

    in Sydney gardens. They are black with yellow spots, and a thin spine on its tail. As they walk, this spine does a cute wiggle. The head and thorax are rather narrower than the abdomen. Late instars develop yellow bands between segments.

    Theretra oldenlandiae
    (Photo: courtesy of Clint Siggins, Newcastle)

    The Caterpillars have also been found feeding on a wide variety of other plants, including :

  • Arum Lily ( Zantedeschia aethiopica, ARACEAE ),
  • Argentine Trumpet Vine ( Clytostoma callistegioides, BIGNONIACEAE ),
  • Climbing Guinea Flower ( Hibbertia scandens, DILLENIACEAE ),
  • Billy Goat Plum ( Planchonia careya, LECYTHIDACEAE ),
  • Godetia ( Clarkia amoena, ONAGRACEAE ),
  • Star Cluster ( Pentas lanceolata, RUBIACEAE ),
  • Australian Native Violet ( Viola hederacea, VIOLACEAE ), and
  • Slender Grape ( Cayratia clematidea, VITACEAE ).

    Theretra oldenlandiae
    (Photo: courtesy of Simon Hunt)

    Theretra oldenlandiae
    (Photo: courtesy of Genevieve Schebeck)

    Theretra oldenlandiae
    (Photo: courtesy of David Lewis)

    However, in captivity, they quite happily consume and thrive on:

  • Lettuce ( Lactuca sativa, ASTERACEAE ).

    They grow to a length of about 7 cms.

    Theretra oldenlandiae
    (Photo: courtesy of Catriona Coote, Sydney)

    The Caterpillars pupate in a sparse dark cocoon in the leaf litter on the soil near the food plant. The pupa has a length of about 4 cms.

    Theretra oldenlandiae
    (Photo: copyright Lyn Finn,
    Hunter Region School of Photography in Newcastle,
    Macquarie Hills, New South Wales)

    The adult moth is brown, with a light stripe edged with dark brown extending from the inner margin to the tip of each fore wing. It also has a pair of white stripes running along its back from its nose to its tail.

    Theretra oldenlandiae
    (Photo: courtesy of Merlin Crossley)

    The species is found as various subspecies across most of south-east Asia, from India to Australia, including :

  • Borneo,
  • China,
  • India,
  • Japan,
  • Philippines,
  • Taiwan, and
  • Thailand,
    and in Australia, specimens have been taken in :
  • Western Australia,
  • Northern Territory,
  • Queensland,
  • New South Wales,
  • Victoria, and
  • South Australia.

    Theretra oldenlandiae
    (Specimen: courtesy of the Macleay Museum, University of Sydney)


    Further reading :

    Ian F.B. Common,
    Moths of Australia, Melbourne University Press, 1990, pls. 16.9, 29.10, 29.11, p. 415.


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