 A recent scientific article (Spurgin et al., 2014) tried to differentiate between these processes by utilizing island populations of "Anthus berthelotii" (Berthelot's pipit) native to three Atlantic archipelagos.Microsatellite markers and approximate Bayesian computation revealed that the northward colonization of the species produced genetic bottlenecks.High levels of genetic structure occurring across the archipelagos indicate an isolation by colonization pattern.