Thousands of bogong moths swarm parts of Sydney and the NSW south coast in recent days, prompting local alerts for residents to avoid harming the insects. Reports also describe homes being affected as the migration brings moths close to residential areas.
The sightings align with the species’ annual movement toward limited cooler cave habitats in the Australian Alps. While the moths are classed as endangered, coverage notes that numbers had fallen sharply in the late 2010s, with cooler, wetter conditions and other factors thought to contribute to a recent increase. The Guardian and The New York Times also frame this year’s surge as notable for scientists, including via citizen-science reporting.
Some outlets attribute the unusually heavy presence around houses to weather—such as winds blowing moths off their expected routes—while others focus more on the broader migration pattern and recent trends in sightings. Across sources, the common message is that reports are increasing in southeastern Australia and residents should remove moths safely rather than kill them.
