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. 2014 May 21;9(5):e98075. doi: 10.1371/journal.pone.0098075

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© 2014 Veen et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Isotope assignments for hybrids with a collared (A) and pied flycatcher mother (B) based on three isotopes (δ ²H, δ ¹³C and δ ¹⁵N) combined. The presumed overwintering grounds of the two parental species are shown in blue for the collared and red for the pied flycatcher. For methodological details see legend of Figure 1 and main text.