2026-06-29T02:13:51Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1184082025-03-18T12:03:27Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Wynn, Joe author Fandos Guzmán, Guillermo author Delmore, Kira author Van Doren, Benjamin M. author Fransson, Thord author Liedvogel, Miriam 2025-03-03T09:19:19Z 2025-03-03T09:19:19Z 2024-07-09 Wynn, J., Fandos, G., Delmore, K., Van Doren, B. M., Fransson, T., & Liedvogel, M. (2025). Could bi-axial orientation explain range expansion in a migratory songbird? Journal of Avian Biology, 2025(1). https://doi.org/10.1111/JAV.03196 0908-8857 10.1111/jav.03196 https://hdl.handle.net/20.500.14352/118408 1600-048X https://doi.org/10.1111/jav.03196 https://nsojournals.onlinelibrary.wiley.com/doi/10.1111/jav.03196 The likelihood of a new migratory route emerging is presumably a function of 1) the associated fitness payoff and 2) the probability that the route arises in the first place. It has been suggested that diametrically opposed ‘reverse' migratory trajectories might be surprisingly common and, if such routes were heritable, it follows that they could underlie the rapid evolution of divergent migratory trajectories. Here, we used Eurasian blackcap (Sylvia atricapilla; ‘blackcap') ringing recoveries and geolocator trajectories to investigate whether a recently evolved northwards autumn migratory route – and accompanying rapid northerly wintering range expansion – could be explained by the reversal of each individual's population-specific traditional southwards migratory direction. We found that northwards autumn migrants were recovered closer to the sites specified by an axis reversal than would be expected by chance, consistent with the rapid evolution of new migratory routes via bi-axial variation in orientation. We suggest that the surprisingly high probability of axis reversal might explain why birds expand their wintering ranges rapidly and divergently, and propose that understanding how migratory direction is encoded is crucial when characterising the genetic component underlying migration. eng Attribution 4.0 International Could bi‐axial orientation explain range expansion in a migratory songbird? journal article 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