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Related Experiment Video

Updated: Jul 4, 2026

Dissection and Grading of Ovarian Development in Wild-Type Female Insects

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Published on: July 14, 2023

Insect migration: do migrant moths know where they are heading?

Ring T Cardé¹

¹Department of Entomology, University of California, Riverside, California 92521, USA. ring.carde@ucr.edu

Current Biology : CB

|June 5, 2008

Summary

Silver Y moths migrate south on specific nights, indicating they sense direction mid-flight. This suggests airborne magnetic navigation in moth migration, challenging previous wind-drift assumptions.

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Area of Science:

Ecology and evolutionary biology
Animal behavior
Sensory biology

Background:

Moth migration is often assumed to be passive, relying on prevailing winds for dispersal.
Previous research lacked direct evidence of active navigation during long-distance insect flights.

Discussion:

Silver Y moths exhibit directional migration, specifically undertaking flights only when winds facilitate southward movement.
This selective migration timing implies an active directional sensing mechanism employed by the moths while airborne.

Key Insights:

Moths appear to possess an airborne navigation system, contrary to the passive wind-drift hypothesis.
The study strongly suggests a magnetic sense is utilized for orientation during nocturnal migration.

Outlook:

Further research should investigate the specific mechanisms of magnetic sense in moths.
Understanding insect navigation can inform conservation strategies for migratory species.