Flocking behaviour in the twilight ascents of Common Swifts Apus apus
Among the many unique flight behaviours of Common Swifts Apus apus , the most puzzling may be their ascents to high altitudes during both dusk and dawn. Twilight ascents have been hypothesized to be functionally related to information acquisition, including integration of celestial orientation cues,...
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crwiley:10.1111/ibi.12704 2024-06-23T07:48:05+00:00 Flocking behaviour in the twilight ascents of Common Swifts Apus apus Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. COST-European Cooperation in Science and Technology through the Action ES1305 ‘ENRAM’ Swedish Research Council Linnaeus 2019 http://dx.doi.org/10.1111/ibi.12704 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fibi.12704 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12704 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 161, issue 3, page 674-678 ISSN 0019-1019 1474-919X journal-article 2019 crwiley https://doi.org/10.1111/ibi.12704 2024-06-13T04:24:59Z Among the many unique flight behaviours of Common Swifts Apus apus , the most puzzling may be their ascents to high altitudes during both dusk and dawn. Twilight ascents have been hypothesized to be functionally related to information acquisition, including integration of celestial orientation cues, high‐altitude visual landmarks and sampling of weather conditions. However, their exact purpose remains unknown. We tracked Common Swifts with tracking radar at their breeding grounds in southern Sweden, and present evidence that during the dusk ascent and dawn descent they often occur in flocks, whereas during the dusk descent and dawn ascent phase they do not. This flocking behaviour suggests that swifts may benefit from conspecific interactions during twilight ascents and descents, possibly through more robust cue acquisition and information exchange in groups, or extending social behaviour also seen in screaming parties before dusk. Article in Journal/Newspaper Apus apus Wiley Online Library Ibis 161 3 674 678 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Among the many unique flight behaviours of Common Swifts Apus apus , the most puzzling may be their ascents to high altitudes during both dusk and dawn. Twilight ascents have been hypothesized to be functionally related to information acquisition, including integration of celestial orientation cues, high‐altitude visual landmarks and sampling of weather conditions. However, their exact purpose remains unknown. We tracked Common Swifts with tracking radar at their breeding grounds in southern Sweden, and present evidence that during the dusk ascent and dawn descent they often occur in flocks, whereas during the dusk descent and dawn ascent phase they do not. This flocking behaviour suggests that swifts may benefit from conspecific interactions during twilight ascents and descents, possibly through more robust cue acquisition and information exchange in groups, or extending social behaviour also seen in screaming parties before dusk. |
author2 |
COST-European Cooperation in Science and Technology through the Action ES1305 ‘ENRAM’ Swedish Research Council Linnaeus |
format |
Article in Journal/Newspaper |
author |
Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. |
spellingShingle |
Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
author_facet |
Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. |
author_sort |
Nilsson, Cecilia |
title |
Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
title_short |
Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
title_full |
Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
title_fullStr |
Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
title_full_unstemmed |
Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
title_sort |
flocking behaviour in the twilight ascents of common swifts apus apus |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/ibi.12704 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fibi.12704 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12704 |
genre |
Apus apus |
genre_facet |
Apus apus |
op_source |
Ibis volume 161, issue 3, page 674-678 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ibi.12704 |
container_title |
Ibis |
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161 |
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3 |
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674 |
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678 |
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1802638526781587456 |