Table 3. AIC scores of all models and parameter estimates for the best model (Model A – IM) computed in fastSIMCOAL2 based on site frequency spectrum data. Models tested correspond to those in Fig. 2. IM and SI refer to ‘isolation with migration’ and ‘strict isolation’, respectively. Δ Likelihood refers to the difference between the maximum observed and maximum estimated likelihood for our data under each model. Time of divergence is expressed in years, assuming a generation time of 1.5 years.