Freezing and Escape in Response to An Overhead Shadow (VIDEO)

California Institute of Technology

Caption

A single fly walks back and forth, and briefly grooms, before a shadow moves overhead. The fly jumps and freezes in place, its wings and other appendages held motionless. After about 5 seconds, the fly suddenly breaks its freezing posture, and escapes.

Credit

William T. Gibson/Caltech

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With attribution.

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