The population of an endangered Australian bat suddenly dropped by up to 16%. No one knows why
Guardian AU
β’Wed, 29 Jul 2026 15:00:37 GMT
π° What Happened
Scientists recorded about 5,000 fewer adult southern bent-wing bats than usual at the Naracoorte cave maternity site in South Australia this summer, representing a 14-16% drop from the five-year average of 28,600 adults. The cause of the sudden decline remains unknown, alarming conservationists.
π The Backstory
The southern bent-wing bat is a critically endangered microbat species found only in south-west Victoria and south-east South Australia. It relies on just three major maternity caves for breeding, with Naracoorte being the largest. The species has been in long-term decline due to habitat loss, climate change, and human disturbance at roosting sites.
π― Why It Matters
The unexplained loss of 16% of the adult population at the species' most important breeding site threatens the long-term viability of an already critically endangered mammal. Understanding the cause is critical for conservation planning and may reveal broader environmental stressors affecting cave-dependent wildlife across Australia.
Scientists recorded about 5,000 fewer adult southern bent-wing bats than usual at the Naracoorte cave maternity site in South Australia this summer, representing a 14-16% drop from the five-year average of 28,600 adults. The cause of the sudden decline remains unknown, alarming conservationists.
The southern bent-wing bat is a critically endangered microbat species found only in south-west Victoria and south-east South Australia. It relies on just three major maternity caves for breeding, with Naracoorte being the largest. The species has been in long-term decline due to habitat loss, climate change, and human disturbance at roosting sites.
The unexplained loss of 16% of the adult population at the species' most important breeding site threatens the long-term viability of an already critically endangered mammal. Understanding the cause is critical for conservation planning and may reveal broader environmental stressors affecting cave-dependent wildlife across Australia.