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. 2017 Jul 31;7:6867. doi: 10.1038/s41598-017-07258-w

Figure 1.

Figure 1

Stable carbon and nitrogen isotope values in primary feathers (P10) of male (Inline graphic) and female (Inline graphic) black-tailed godwits staging in Extremadura rice fields during northward migration. Gaussian bivariate ellipses (95% probability interval of the mean population) are shown.