Figure 2
From: No evidence for assortative mating within a willow warbler migratory divide
Male phenotype (A) and genotype (B) in relation to capture date (for males captured between 10 May and 10 June) (n = 56). A δ15N values (dashed lines at 7‰ and 9‰ represented cut-offs for individuals likely wintering in West Africa and East to South Africa, respectively), B Bayesian assignment probabilities (genetic ancestry) to the northern subspecies cluster (dashed lines represent mean assignment probabilities in the southern and northern reference sets, respectively). Time for capture dates was plotted as the number of days after 1 May.