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Gap selection and steering during obstacle avoidance in pigeons.

Natalia Pérez-Campanero Antolín1, Graham K Taylor1

  • 1Department of Biology, University of Oxford, 11A Mansfield Road, Oxford OX1 3SZ, UK.

The Journal of Experimental Biology
|December 28, 2022
PubMed
Summary
This summary is machine-generated.

Pigeons choose flight gaps based on handedness, not gap size. Their steering through gaps uses delayed proportional navigation, a two-phase flight strategy for navigating cluttered environments.

Keywords:
Columba liviaBird flightGap negotiationGuidance lawMotion captureProportional navigationVisually guided flight

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Area of Science:

  • * Avian biology
  • * Biomechanics
  • * Robotics and control theory

Background:

  • * Bird flight through cluttered environments is a complex behavior inspiring scientific and engineering research.
  • * Understanding avian navigation and steering mechanisms is crucial for biomimetic applications.

Purpose of the Study:

  • * To investigate how birds select gaps for flight.
  • * To determine the steering mechanisms birds employ when flying through gaps.

Main Methods:

  • * Experimental release of pigeons (Columbia livia domestica) in a controlled hall with two vertical gaps.
  • * High-speed motion capture system to track pigeon trajectories.
  • * Algorithmic modeling of flight paths using six candidate guidance laws.

Main Results:

  • * Pigeons' gap selection was influenced by intrinsic handedness, not extrinsic factors like gap size or alignment.
  • * Pigeon steering behavior was best modeled by delayed proportional navigation.
  • * Flight behavior appears to be a two-phase process: initial forward movement followed by closed-loop guidance to the gap's midpoint.

Conclusions:

  • * Avian gap selection is primarily driven by internal biases (handedness).
  • * Delayed proportional navigation explains pigeon steering through gaps.
  • * Findings offer insights into sensorimotor mechanisms for clutter negotiation and target-oriented behaviors in birds.