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Related Experiment Videos

Migrating birds respond to Project Seafarer's electromagnetic field

R P Larkin, P J Sutherland

    Science (New York, N.Y.)
    |February 25, 1977
    PubMed
    Summary

    Migrating birds alter flight paths near operating alternating-current antenna systems. This suggests birds can sense low-intensity electromagnetic fields during nocturnal migration.

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    Area of Science:

    • Ornithology
    • Bioelectromagnetics
    • Animal Behavior

    Background:

    • Nocturnal migratory birds navigate using various cues, including Earth's magnetic field.
    • Potential anthropogenic influences on migratory behavior are increasingly studied.
    • Electromagnetic fields (EMFs) are ubiquitous in modern environments.

    Purpose of the Study:

    • To investigate if migrating birds react to operating alternating-current (AC) antenna systems.
    • To determine if birds can sense low-intensity AC electromagnetic fields.

    Main Methods:

    • Radar tracking of individual migrating birds.
    • Observation of bird flight behavior (altitude, turning) over an AC antenna system.
    • Comparison of behavior when the antenna system was operating versus not operating.

    Main Results:

    • Birds exhibited significantly more frequent altitude changes and turns when the AC antenna system was operational.
    • No significant behavioral changes were observed when the antenna system was not operating.

    Conclusions:

    • Migrating birds demonstrate altered flight behavior in response to operational AC antenna systems.
    • These findings suggest that birds possess the capability to sense low-intensity AC electromagnetic fields during nocturnal migratory flight.

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