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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Wiley-Blackwell
2019
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Online Access: | https://lup.lub.lu.se/record/6f84ae07-dda5-4729-b6b4-86d2e0894399 https://doi.org/10.1111/ibi.12704 |
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ftulundlup:oai:lup.lub.lu.se:6f84ae07-dda5-4729-b6b4-86d2e0894399 2023-05-15T14:17:12+02:00 Flocking behaviour in the twilight ascents of Common Swifts Apus apus Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. 2019-01-12 https://lup.lub.lu.se/record/6f84ae07-dda5-4729-b6b4-86d2e0894399 https://doi.org/10.1111/ibi.12704 eng eng Wiley-Blackwell https://lup.lub.lu.se/record/6f84ae07-dda5-4729-b6b4-86d2e0894399 http://dx.doi.org/10.1111/ibi.12704 scopus:85060768868 Ibis; 161(3), pp 674-678 (2019) ISSN: 0019-1019 Zoology Evolutionary Biology flight altitude flight behaviour screaming parties contributiontojournal/article info:eu-repo/semantics/article text 2019 ftulundlup https://doi.org/10.1111/ibi.12704 2023-02-01T23:37:29Z 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 Lund University Publications (LUP) Ibis 161 3 674 678 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Zoology Evolutionary Biology flight altitude flight behaviour screaming parties |
spellingShingle |
Zoology Evolutionary Biology flight altitude flight behaviour screaming parties Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. Flocking behaviour in the twilight ascents of Common Swifts Apus apus |
topic_facet |
Zoology Evolutionary Biology flight altitude flight behaviour screaming parties |
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. |
format |
Article in Journal/Newspaper |
author |
Nilsson, Cecilia Bäckman, Johan Dokter, Adriaan M. |
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-Blackwell |
publishDate |
2019 |
url |
https://lup.lub.lu.se/record/6f84ae07-dda5-4729-b6b4-86d2e0894399 https://doi.org/10.1111/ibi.12704 |
genre |
Apus apus |
genre_facet |
Apus apus |
op_source |
Ibis; 161(3), pp 674-678 (2019) ISSN: 0019-1019 |
op_relation |
https://lup.lub.lu.se/record/6f84ae07-dda5-4729-b6b4-86d2e0894399 http://dx.doi.org/10.1111/ibi.12704 scopus:85060768868 |
op_doi |
https://doi.org/10.1111/ibi.12704 |
container_title |
Ibis |
container_volume |
161 |
container_issue |
3 |
container_start_page |
674 |
op_container_end_page |
678 |
_version_ |
1766289105611653120 |