Analysis of stable isotopes in feathers of Red-backed Shrikes ( Lanius collurio ): no evidence for different wintering habitats of males and females

We investigated the stable isotope signatures (d15N and d13C) of greater feather covers of male and female Red-backed Shrikes (Lanius collurio) of a southern German population. Male and female birds did not differ in their isotope signatures, thus revealing similar winter grounds for both sexes

Hans Jakober, Wolfgang Stauber, Franz Bairlein and Maren Voss, J Ornithol (2007) 148:129-131