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, As a reminder, prior values for time periods were initially drawn from log-uniform distributions bounded between 100 and 500,000 generations in the main document. We here report values for the proportion of votes, prior error rates and posterior probabilities of the best scenario on ten replicate analyses based on ten different reference tables (assuming a set of uniform priors bounded for time periods). Scenarios are depicted in Figure 2. For each reference table, the number of datasets simulated using DIYABC was set to 150,000 and the number of RF-trees was 3,000. The scenario SCB was the best supported for all replicate analyses: it involves a bottleneck event in S. g. flaviventris right after divergence, a population size contraction in the ancestral population and not any secondary contact, We empirically evaluated the influence of shape of prior distributions for the time periods on our inferences by re-conducting all ABC-RF analyses assuming a set of uniform priors bounded between 100 and 500,000 generations for those time periods