Evidence map›Paper›PMID 31640502›Full record

ArticleJournal of the Royal Society, Interface2019

Collective turns in jackdaw flocks: kinematics and information transfer.

Hangjian Ling, Guillam E Mclvor, Joseph Westley, Kasper van der Vaart, Jennifer Yin, Richard T Vaughan, Alex Thornton, Nicholas T Ouellette

Abstract read
In one paragraph

Article in Journal of the Royal Society, Interface, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed.

  1. Article
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  4. It pays to follow the leader: Metabolic cost of flight is lower for trailing birds in small groups.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  5. Article
  6. A multi-scale review of the dynamics of collective behaviour: from rapid responses to ontogeny and evolution.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Review
  7. Article
  8. Article
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  15. Article
  16. Article
  17. Environmental perturbations induce correlations in midge swarms.Journal of the Royal Society, Interface · 2020
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Hangjian LingDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA.
Guillam E MclvorCentre for Ecology and Conservation, University of Exeter, Penryn, UK.
Joseph WestleyCentre for Ecology and Conservation, University of Exeter, Penryn, UK.
Kasper van der VaartDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA.
Jennifer YinDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA.
Richard T VaughanSchool of Computing Science, Simon Fraser University, Burnaby, British Columbia, Canada.
Alex ThorntonCentre for Ecology and Conservation, University of Exeter, Penryn, UK.
Nicholas T OuelletteDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The rapid, cohesive turns of bird flocks are one of the most vivid examples of collective behaviour in nature, and have attracted much research. Three-dimensional imaging techniques now allow us to characterize the kinematics of turning and their group-level consequences in precise detail. We measured the kinematics of flocks of wild jackdaws executing collective turns in two contexts: during transit to roosts and anti-predator mobbing. All flocks reduced their speed during turns, probably because of constraints on individual flight capability. Turn rates increased with the angle of the turn so that the time to complete turns remained constant. We also find that context may alter where turns are initiated in the flocks: for transit flocks in the absence of predators, initiators were located throughout the flocks, but for mobbing flocks with a fixed ground-based predator, they were always located at the front. Moreover, in some transit flocks, initiators were far apart from each other, potentially because of the existence of subgroups and variation in individual interaction ranges. Finally, we find that as the group size increased the information transfer speed initially increased, but rapidly saturated to a constant value. Our results highlight previously unrecognized complexity in turning kinematics and information transfer in social animals.

Indexed as

Models, BiologicalSocial BehaviorAnimalsCrowsFlight, Animalbird flockscollective behaviourcollective turnsflight kinematicsinformation transferthree-dimensional imaging

Identifiers

PMID31640502
PMCPMC6833319

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.