At first glance, Australia’s bogong moth is a decidedly unspectacular-looking creature. The moths are typically a dark, mottled brown and each weighs less than a Tic Tac mint or half a gram. But looks can be deceiving. Every spring in the Southern Hemisphere, from September to November, billions of bogong moths (Agrotis infusa) undertake an epic journey. Using the stars and the Earth’s magnetic field, these tiny insects navigate hundreds of kilometers across Australia. Their destination is the Australian Alps, located in the far southeast corner of the country, where they will shelter in cool caves for the duration of the summer. The moths are a critical resource for the many rare and wonderful species that live in these mountains. “The whole [alpine] zone relies on the bogong moths,” said Marissa Parrott, a senior conservation biologist at Zoos Victoria. “They’re the second largest influx of nutrients into the Alps every year, beaten only by the sun.” But the moth’s future is far from certain. Their numbers have been slowly declining since the 1980s, and in 2017, populations crashed, likely due to extreme drought across much of southeastern Australia. A bogong moth in Sydney. Image by John Tann via Wikimedia Commons (CC BY 2.0). At several locations, cave walls that had once been densely blanketed with moths — several thousand occupying each square meter (equivalent to 11 square feet) — were all but empty. “They went from four billion to nearly undetectable,” Parrott said. The population collapse threatens the alpine ecosystem,…This article was originally published on Mongabay
From Conservation news via This RSS Feed.
