Bogong moths swarm southeastern Australia

Thousands of Bogong moths have recently covered homes, vehicles, and other spaces across southeastern Australia, including parts of New South Wales. This unusual concentration has drawn significant attention from scientists following years of sharp population declines in the migratory species.

Approximately 9,000 sightings have been recorded on the citizen science platform iNaturalist, though the actual number may be higher due to the insects traveling in large swarms. The Bogong moth is an indigenous insect that migrates toward the Australian Alps and the Snowy Mountains each spring to escape summer heat.

The sudden influx is notable because the species has faced sustained population decreases since the 1980s, driven by factors such as rising temperatures and droughts. In 2017, the population experienced a collapse of up to 99.5%, leading to its inclusion on the IUCN Red List as an endangered species in 2021. Researchers hope this high concentration will provide data on migration and reproduction conditions, though it remains unclear if this represents a stable recovery or a temporary fluctuation.