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Sydney's Skies Ablaze: Moths Return in Astonishing Numbers
9 Oct
Summary
- Bogong moths, once a common sight, experienced a 99% population decline.
- Recent high rainfall has boosted breeding and feeding conditions for moths.
- Citizen scientists are crucial for monitoring declining insect populations.
In 2000, while millions watched the Sydney Olympics, a vast migration of bogong moths swarmed, even appearing on rain radars due to their attraction to stadium lights. This year, Australia's east coast has seen an explosion in bogong moth populations, a stark contrast to recent decades when numbers plummeted by 99% between 2017 and 2019. Factors like habitat destruction, drought, and climate change had severely impacted these insects.
The current remarkable resurgence is largely attributed to two years of high rainfall, fostering ideal breeding and feeding conditions. Strong winds may have also contributed to the unusual congregations observed, including in Sydney. This renewed abundance provides scientists with invaluable data on insect health and population trends.
This phenomenon highlights 'shifting baseline syndrome,' where younger generations may perceive current, lower insect numbers as normal. The return of bogong moths, alongside efforts by citizen scientists to monitor Christmas beetles and discover new insect species, underscores the importance of public engagement in conservation. Observing insects like bogong moths, cicadas, bees, and Christmas beetles, and contributing data through platforms like Moth Tracker or iNaturalist, is vital for understanding and protecting Australia's biodiversity.
