Alice Springs Fauna •

Alice Springs True Bugs (Heteroptera)Eucalyptus Tip-wilting Bug Ground Shield Bug (Choerocoris paganus) Ippatha australiensis Soapberry Bugs, Leptocoris sp Spilostethus sp Water Scorpion

Known as the Eucalyptus Tip-wilting Bug (Amorbus alternatus), goes through a number of instar stages before developing into the adult of the species. Their other common name is Gumtree Tip-wilter Bug, as the name suggested, is where they are often found.

Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT

Whilst the adult of the Eucalyptus Tip-wilter Bug are mainly dark brown in colour, with light brown and orange on the legs and antennae. Along the edges of the abdomen they have alternating brown and yellow pattern. The nymphs are different in that they are a colourful orange, with bright blue patterns (sometimes an yellow-orange to pink). Both adults and nymphs can release strong repellent odour when disturbed.

Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT

As they grow, the nymph (the juvenile) stages of moulting the skin, a process referred to as an “instar”. In some Amorbus sp, these instars can involve some dramatic colour changes, appearing to be different species.

Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT
Eucalyptus Tip-wilting Bug (Amorbus alternatus), nymph, Araluen, Alice Springs NT

  • Scientific classification
  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Hexapoda
  • Class: Insecta
  • Informal: Pterygotes
  • Order: Hemiptera
  • Suborder: Heteroptera
  • Infraorder: Pentatomomorpha
  • Superfamily: Coreoidea
  • Family: Coreidae
  • Subfamily: Coreinae
  • Tribe: Amorbini
  • Genus: Amorbus
  • Species: Amorbus alternatus

Footnote & References

  1. Eucalyptus Tip-wilter Bugs – Tribe Amorbini, Brisbane Insects and Spiders, http://www.brisbaneinsects.com/brisbane_coreidbugs/Amorbini.htm
  2. Amorbus Dallas, 1852, Atlas of Living Australia, https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/8a14795b-f915-43a1-93c9-16dba4c195ac
  3. Genus Amorbus – observation listed on iNaturalistAU, https://inaturalist.ala.org.au/observations/142352905
  4. Amorbus alternatus, iNaturalistAU, https://inaturalist.ala.org.au/taxa/510505-Amorbus-alternatus

Alice Springs True Bugs (Heteroptera)Eucalyptus Tip-wilting Bug Ground Shield Bug (Choerocoris paganus) Ippatha australiensis Soapberry Bugs, Leptocoris sp Spilostethus sp Water Scorpion

Alice Springs InsectsAntlion (Heoclisis fundata) Ants (Formicidae) Bees Beetles Butterflies & Moths (Lepidopterans) Diptera Dragonflies Orthoptera True Bugs (Heteroptera) Wasps

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