Scientists Discover Australia's Heaviest Stick Insect: Acrophylla alta

A groundbreaking discovery has emerged from James Cook University in northern Australia, where a team of scientists has identified a new species of giant stick insect named Acrophylla alta. This remarkable insect stands out as the heaviest stick insect discovered in Australia to date, weighing an impressive 44 grams, or roughly the same as a golf ball, and measuring 40 centimeters in length. The new species was located in the remote mountainous region of Queensland, specifically on the Atherton Tableland, which sits over 900 meters above sea level and approximately 50 kilometers southwest of Cairns. This area is recognized as part of the Wet Tropics World Heritage Area, characterized by cold, humid conditions and challenging access. These elements are likely why this unique insect had remained hidden until its recent discovery. Professor Angus Emmott, one of the researchers leading the study, stated that Acrophylla alta is restricted to a small area of high-altitude rainforest and primarily resides in the forest canopy. Due to their high location, they are rather difficult to spot, unless a cyclone or a bird inadvertently brings them down to lower elevations. The research initiative began with the examination of a photograph that sparked the interest of the scientists. This curiosity propelled them to conduct further searches, ultimately resulting in the discovery of two female specimens. One of these females laid eggs, a critical event that confirmed the existence of this undocumented species. The findings have been compiled and published in the scientific journal Zootaxa, and the specimens have been added to the Queensland Museum collection for future research endeavors. Notably, no males of the species have been discovered yet. The significant body mass of Acrophylla alta is believed to be an evolutionary response to the cold and humid climate specific to its habitat. This adaptation likely enhances their survival capabilities in such conditions. Over millions of years, these insects have achieved their considerable size as a necessary adaptation to their environment, according to Professor Emmott. While Acrophylla alta holds the title of the heaviest insect recorded in Australia, it is important to note that it does not claim the title of the heaviest insect in the world. That honor belongs to the giant weta, an endemic species from New Zealand resembling a grasshopper, which can weigh up to 71 grams according to the Guinness World Records. This discovery not only underscores the incredible biodiversity found within Australia but also highlights the importance of ongoing research in understanding and documenting the species that inhabit these unique ecosystems. Related Sources: • Source 1 • Source 2