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Table 1 Morphometric measurements and stable isotope values for males of the ssp. oenanthe in three different regions of their wintering range. Values are given ± SD

From: Morphometrics and stable isotopes differentiate wintering populations of a migratory bird

  Kenya (N = 14) a Mauritania/Mali (N = 16) a Niger (N = 29) a
Wing chord [mm] 99.3 ± 2.4 97.7 ± 4.4 97.0 ± 2.4
Tarsus [mm] 28.4 ± 0.9 27.4 ± 0.8 27.2 ± 1.0
Bill length [mm] 20.5 ± 0.6 20.0 ± 0.8 19.5 ± 0.7
Bill depth [mm] 4.1 ± 0.2 4.2 ± 0.3 4.0 ± 0.3
Bill width [mm] 3.8 ± 0.2 3.8 ± 0.2 3.7 ± 0.2
c2-index 0.36 ± 0.09 0.28 ± 0.11 0.29 ± 0.13
c3-index −1.08 ± 0.13 −1.13 ± 0.19 −1.12 ± 0.19
δ2H [‰] a −47.39 ± 5.56 −52.94 ± 12.20 −65.29 ± 8.96
δ15N [‰] 7.79 ± 1.47 6.76 ± 2.36 10.85 ± 2.48
δ13C [‰] −23.23 ± 0.70 −23.39 ± 0.75 −22.58 ± 1.16
  1. a Sample sizes for δ2H. Kenya: N = 11; Mauritania/Mali: N = 13; Niger: N = 14