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Related Experiment Videos

Echolocation performance of the vampire bat (Desmodus rotundus).

U Schmidt, C Schmidt

    Zeitschrift Fur Tierpsychologie
    |December 1, 1977
    PubMed
    Summary

    Neotropical vampire bats (Desmodus rotundus) use echolocation with limited object detection. They can discern a 1 cm strip but not a 0.5 cm strip at 50 cm.

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    Area of Science:

    • Zoology
    • Bioacoustics
    • Sensory Ecology

    Background:

    • Neotropical vampire bats (Desmodus rotundus) utilize echolocation for navigation and foraging.
    • Echolocation in bats involves emitting ultrasonic pulses and interpreting returning echoes.

    Purpose of the Study:

    • To analyze the echolocation sounds produced orally by Desmodus rotundus.
    • To evaluate the object detection performance of the Desmodus rotundus echolocation system.

    Main Methods:

    • Analysis of orally produced echolocation sounds.
    • Two-choice training experiments with two vampire bats to assess object detection thresholds.

    Main Results:

    • Vampire bats could detect a 1 cm wide metal strip at 50 cm.
    • Vampire bats failed to detect a 0.5 cm wide metal strip at the same distance.
    • Echolocation pulses at 50 cm appear to sample an area with a diameter of 2.5–3.0 cm.

    Conclusions:

    • The object detection capability of Desmodus rotundus echolocation is limited.
    • Spatial resolution is constrained, with a minimum detectable object size around 1 cm at 50 cm.

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