Slight sexual dimorphism in tail-fork depth of Common Swifts Apus apus

For two new data sets from the Netherlands, we show that male Common Swifts have deeper tail forks than females. Although this hints at sexual selection, with a degree of masculine extravagance at work, the male dimensions are closer to the design rules for an aerodynamically optimal swift than are...

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Bibliographic Details
Published in:Ringing & Migration
Main Authors: Jukema, Joop, van de Wetering, Henk, Gutiérrez, Jorge S., Piersma, Theunis
Format: Article in Journal/Newspaper
Language:English
Published: 2023
Subjects:
aerodynamics
biometry
Common Swift
morphometrics
natural selection
sexual selection
sexual size dimorphy
Apus apus
Online Access:https://hdl.handle.net/11370/9d1ec805-7147-4355-9b8f-91f0fecc5f9f
https://research.rug.nl/en/publications/9d1ec805-7147-4355-9b8f-91f0fecc5f9f
https://doi.org/10.1080/03078698.2023.2262804
https://pure.rug.nl/ws/files/925132018/Slight_sexual_dimorphism_in_tail-fork_depth_of_Common_Swifts_Apus_apus_1_.pdf
http://www.scopus.com/inward/record.url?scp=85174962939&partnerID=8YFLogxK
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Summary:For two new data sets from the Netherlands, we show that male Common Swifts have deeper tail forks than females. Although this hints at sexual selection, with a degree of masculine extravagance at work, the male dimensions are closer to the design rules for an aerodynamically optimal swift than are those of females.

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