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Related Experiment Video

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Flying Insect Detection and Classification with Inexpensive Sensors
05:16

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Published on: October 15, 2014

From disorder to order in marching locusts.

C Buhl1, D J T Sumpter, I D Couzin

  • 1Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. camille.buhl@adelaide.edu.au

Science (New York, N.Y.)
|June 3, 2006
PubMed
Summary

Animal group movement transitions from disordered to ordered motion with increasing density. This study confirms this prediction in locust nymphs, identifying a critical density for coordinated marching and dynamic instabilities.

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Area of Science:

  • Theoretical physics
  • Animal behavior
  • Collective motion

Background:

  • Theoretical models predict universal group-level properties in mass-migrating animal groups.
  • A key prediction involves a density-dependent transition from disordered individual movement to aligned collective motion.
  • Understanding this transition is vital for managing swarming insect pests like the desert locust.

Purpose of the Study:

  • To confirm theoretical predictions of a transition from disordered to ordered movement in animal groups.
  • To identify the critical density for coordinated marching in desert locust nymphs.
  • To investigate dynamic instabilities in locust group motion.

Main Methods:

  • Observational studies of locust nymph groups.
  • Analysis of movement patterns at varying densities.
  • Identification of critical density thresholds for collective motion.

Main Results:

  • Confirmed the predicted rapid transition from disordered to ordered movement in locust nymphs.
  • Identified a critical density for the onset of coordinated marching behavior.
  • Demonstrated dynamic instability in group motion at field-relevant densities, enabling rapid direction changes.

Conclusions:

  • Locust nymph groups exhibit density-dependent transitions in collective motion, aligning with theoretical predictions.
  • The identified critical density and dynamic instabilities offer insights into locust swarm behavior.
  • Findings have implications for understanding and controlling swarming insect pests.