Publikation: Contrasting coloured ventral wings are a visual collision avoidance signal in birds
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Collisions between fast-moving objects often cause severe damage, but collision avoidance mechanisms of fast-moving animals remain understudied. Particularly, birds can fly fast and often in large groups, raising the question of how individuals avoid in-flight collisions that are potentially lethal. We tested the collision-avoidance hypothesis, which proposes that conspicuously contrasting ventral wings are visual signals that help birds to avoid collisions. We scored the ventral wing contrasts for a global dataset of 1780 bird species. Phylogenetic comparative analyses showed that larger species had more contrasting ventral wings than smaller species, and that in larger species, colonial breeders had more contrasting ventral wings than non-colonial breeders. Evidently, larger species have lower manoeuvrability than smaller species, and colonial-breeding species frequently encounter con- and heterospecifics, increasing their risk of in-flight collisions. Thus, more contrasting ventral wing patterns in these species are a sensory mechanism that facilitates collision avoidance.
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ZHENG, Kaidan, Dan LIANG, Xuwen WANG, Yuqing HAN, Michael GRIESSER, Yang LIU, Pengfei FAN, 2022. Contrasting coloured ventral wings are a visual collision avoidance signal in birds. In: Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2022, 289(1978), 20220678. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2022.0678BibTex
@article{Zheng2022-07-13Contr-59471, year={2022}, doi={10.1098/rspb.2022.0678}, title={Contrasting coloured ventral wings are a visual collision avoidance signal in birds}, number={1978}, volume={289}, issn={0962-8452}, journal={Proceedings of the Royal Society of London, Series B : Biological Sciences}, author={Zheng, Kaidan and Liang, Dan and Wang, Xuwen and Han, Yuqing and Griesser, Michael and Liu, Yang and Fan, Pengfei}, note={Article Number: 20220678} }
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