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Researchers Describe New Giant Stick Insect as Australia’s Heaviest

A peer-reviewed Zootaxa paper outlines its high-altitude canopy habitat with male specimens still uncollected.

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Overview

  • The Zootaxa study confirms Acrophylla alta reaches 40 centimeters in length and weighs about 44 grams, surpassing the giant burrowing cockroach as the heaviest insect on the continent.
  • Distinctive egg morphology provided key diagnostic features for formal classification despite the absence of male specimens.
  • Collected females are restricted to remote rainforest canopies above 900 meters near Millaa Millaa and Mount Hypipamee in Far North Queensland.
  • Although the insects have substantial wings, their bulky bodies limit them to gliding rather than sustained flight.
  • James Cook University and Queensland Museum teams are conducting targeted nocturnal surveys to locate a male specimen needed for complete taxonomic naming.