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Bogong Moths Navigate 1,000-Kilometre Migration Using Stars

Researchers found vulnerable Bogong moths rely on specialized neurons to interpret the Milky Way in concert with geomagnetic cues for their 1,000-kilometre spring migration.

© Dr. Ajay Narendra (Macquarie University, Australia)
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Bogong moths are named after the Indigenous Australian word for brown

Overview

  • Flight simulator trials under realistic star fields confirmed that Bogong moths can orient solely by celestial patterns when magnetic cues are disabled.
  • When researchers obscured stars, the moths switched to using Earth’s magnetic field, demonstrating a robust dual compass system.
  • Neural recordings revealed specialized brain cells tuned to sky orientation that fire most strongly when moths face seasonally correct headings.
  • Moths likely use the bright band of the Milky Way and possibly the Carina Nebula as visual landmarks to guide their journey.
  • Steep population declines have led to the species being listed as vulnerable, with findings informing conservation efforts around light pollution and habitat protection.