Fine-scale changes in speed and altitude suggest protean movements in homing pigeon flights

Main Authors: Garde, Baptiste, Wilson, Rory, Lempidakis, Emmanouil, Börger, Luca, Portugal, Steven, Hedenström, Anders, Dell'Omo, Giacomo, Quetting, Michael, Wikelski, Martin, Shepard, Emily L. C.
Format: info dataset eJournal
Terbitan: , 2021
Subjects:
Online Access: https://zenodo.org/record/4479828
ctrlnum 4479828
fullrecord <?xml version="1.0"?> <dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><creator>Garde, Baptiste</creator><creator>Wilson, Rory</creator><creator>Lempidakis, Emmanouil</creator><creator>B&#xF6;rger, Luca</creator><creator>Portugal, Steven</creator><creator>Hedenstr&#xF6;m, Anders</creator><creator>Dell'Omo, Giacomo</creator><creator>Quetting, Michael</creator><creator>Wikelski, Martin</creator><creator>Shepard, Emily L. C.</creator><date>2021-07-06</date><description>The power curve provides a basis for predicting adjustments that animals make in flight speed, for example in relation to wind, distance, habitat foraging quality and objective. However, relatively few studies have examined how animals respond to the landscape below them, which could affect speed and power allocation through modifications in climb rate and perceived predation risk. We equipped homing pigeons (Columba livia) with high-frequency loggers to examine how flight speed, and hence effort, varies in relation to topography and land cover. Pigeons showed mixed evidence for an energy-saving strategy, as they minimized climb rates by starting their ascent ahead of hills, but selected rapid speeds in their ascents. Birds did not modify their speed substantially in relation to land cover, but used higher speeds during descending flight, highlighting the importance of considering the rate of change in altitude before estimating power use from speed. Finally, we document an unexpected variability in speed and altitude over fine scales; a source of substantial energetic inefficiency. We suggest this may be a form of protean behaviour adopted to reduce predation risk when flocking is not an option, and that such a strategy could be widespread.</description><description>Funding provided by: H2020 European Research CouncilCrossref Funder Registry ID: http://dx.doi.org/10.13039/100010663Award Number: 715874</description><description>Methods detailed in manuscript (https://doi.org/10.1098/rsos.210130).</description><identifier>https://zenodo.org/record/4479828</identifier><identifier>10.5061/dryad.x69p8czh8</identifier><identifier>oai:zenodo.org:4479828</identifier><relation>doi:10.1098/rsos.210130</relation><relation>doi:10.5281/zenodo.5076051</relation><relation>url:https://zenodo.org/communities/dryad</relation><rights>info:eu-repo/semantics/openAccess</rights><rights>https://creativecommons.org/publicdomain/zero/1.0/legalcode</rights><subject>flight speed</subject><subject>predation risk</subject><subject>protean behaviour</subject><subject>flocking</subject><subject>Pigeon</subject><title>Fine-scale changes in speed and altitude suggest protean movements in homing pigeon flights</title><type>Other:info:eu-repo/semantics/other</type><type>Other:dataset</type><recordID>4479828</recordID></dc>
format Other:info:eu-repo/semantics/other
Other
Other:dataset
Journal:eJournal
Journal
author Garde, Baptiste
Wilson, Rory
Lempidakis, Emmanouil
Börger, Luca
Portugal, Steven
Hedenström, Anders
Dell'Omo, Giacomo
Quetting, Michael
Wikelski, Martin
Shepard, Emily L. C.
title Fine-scale changes in speed and altitude suggest protean movements in homing pigeon flights
publishDate 2021
topic flight speed
predation risk
protean behaviour
flocking
Pigeon
url https://zenodo.org/record/4479828
contents The power curve provides a basis for predicting adjustments that animals make in flight speed, for example in relation to wind, distance, habitat foraging quality and objective. However, relatively few studies have examined how animals respond to the landscape below them, which could affect speed and power allocation through modifications in climb rate and perceived predation risk. We equipped homing pigeons (Columba livia) with high-frequency loggers to examine how flight speed, and hence effort, varies in relation to topography and land cover. Pigeons showed mixed evidence for an energy-saving strategy, as they minimized climb rates by starting their ascent ahead of hills, but selected rapid speeds in their ascents. Birds did not modify their speed substantially in relation to land cover, but used higher speeds during descending flight, highlighting the importance of considering the rate of change in altitude before estimating power use from speed. Finally, we document an unexpected variability in speed and altitude over fine scales; a source of substantial energetic inefficiency. We suggest this may be a form of protean behaviour adopted to reduce predation risk when flocking is not an option, and that such a strategy could be widespread.
Funding provided by: H2020 European Research CouncilCrossref Funder Registry ID: http://dx.doi.org/10.13039/100010663Award Number: 715874
Methods detailed in manuscript (https://doi.org/10.1098/rsos.210130).
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