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Slight sexual dimorphism in tail-fork depth of Common Swifts Apus apus
Jukema, J.; van de Wetering, H.; Gutiérrez, J.S.; Piersma, T. (2023). Slight sexual dimorphism in tail-fork depth of Common Swifts Apus apus. Ringing & Migration 38(1-2): 25-28. https://dx.doi.org/10.1080/03078698.2023.2262804
In: Ringing & Migration. TAYLOR & FRANCIS LTD: Abingdon. ISSN 0307-8698, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Author keywords
    Common Swift; morphometrics; biometry; sexual size dimorphy; natural selection; sexual selection; aerodynamics
Auteurs  Top 
  • Jukema, J.
  • van de Wetering, H.
  • Gutiérrez, J.S., meer
  • Piersma, T., meer
Abstract
    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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