Data from: Migration of red-backed shrikes from the Iberian Peninsula: optimal or sub-optimal detour?

When using this dataset, please cite the original article.

Tøttrup AP, Pedersen L, Onrubia A, Klaassen RHG, Thorup K (2017) Migration of red-backed shrikes from the Iberian Peninsula: optimal or sub-optimal detour? Journal of Avian Biology 48(1): 149–154. doi:10.1111/jav.01352

Additionally, please cite the Movebank data package:

Tøttrup AP, Pedersen L, Onrubia A, Thorup K (2017) Data from: Migration of red-backed shrikes from the Iberian Peninsula: optimal or sub-optimal detour? Movebank Data Repository. doi:10.5441/001/1.32m2335q
Cite | Share
Download the data package citation in the following formats:
   RIS (compatible with EndNote, Reference Manager, ProCite, RefWorks)
   BibTex (compatible with BibDesk, LaTeX)

Package Identifier doi:10.5441/001/1.32m2335q  
 
Abstract The current Northern Hemisphere migration systems are believed to have arisen since the last glaciation. In many cases, birds do not migrate strait from breeding to non-breeding areas but fly via a detour. All western European populations of red-backed shrikes Lanius collurio are assumed to reach their southern African wintering grounds detouring via southeast Europe. Based on theoretical considerations under an optimality framework this detour is apparently optimal. Here, we use individual geolocator data on red-backed shrikes breeding in Spain to show that these birds do indeed detour via southeast Europe en route to southern Africa where they join other European populations of red-backed shrikes and return via a similar route in spring. Disregarding potential wind assistance, the routes taken for the tracked birds in autumn were not optimal compared to crossing the barrier directly. For spring migration the situation was quite different with the detour apparently being optimal. However, when considering potential wind assistance estimated total air distances during autumn migration were overall similar and the barrier crossing shorter along the observed routes. We conclude that considering the potential benefit of wind assistance makes the route via southeast Europe likely to be less risky in autumn. However, it cannot be ruled out that other factors, such as following a historical colonisation route could still be important.
Keywords animal movement, animal tracking, avian migration, Iberian Peninsula, Lanius collurio, light-level logger, red-backed shrike,

Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-light levels View File Details
Download: Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-light levels.csv ( 202.8Mb )
Download: README.txt ( 16.75Kb )
To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  



Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-tracks View File Details
Download: README.txt ( 16.75Kb )
Download: Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-tracks.csv ( 1.427Mb )
To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  



Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-reference-data View File Details
Download: README.txt ( 16.75Kb )
Download: Migration of red-backed shrikes from the Iberian Peninsula (data from Tøttrup et al. 2017)-reference-data.csv ( 4.284Kb )
To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  


Submission