About the Authors
- Thomas Alerstam
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*To whom correspondence should be addressed. E-mail: Thomas.Alerstam@ekol.lu.se
Affiliation Department of Animal Ecology, Lund University, Lund, Sweden
- Mikael Rosén
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Affiliation Department of Animal Ecology, Lund University, Lund, Sweden
- Johan Bäckman
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Affiliation Department of Animal Ecology, Lund University, Lund, Sweden
- Per G. P Ericson
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Affiliation Department of Vertebrate Zoology, Swedish Museum of Natural History, Stockholm, Sweden
- Olof Hellgren
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Affiliation Department of Animal Ecology, Lund University, Lund, Sweden
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
TA and his laboratory organized and carried out the radar field work. MR extracted and prepared the final dataset and performed the scaling analyses. JB organized the tracking information into a database, including information about biometry. PGPE constructed the phylogenetic tree and classified the species into main phylogenetic groups, and OH performed the scaling analyses based on phylogenetic contrast data. TA, MR, JB, PGPE, and OH participated in the evaluation and discussion of results and writing of manuscript.