Most models of ecological speciation concern phytophagous insects in which speciation is thought to be driven by host shifts and subsequent adaptations of populations. Despite the ever‐increasing number of studies, the current evolutionary status of most models remains incompletely resolved, as estimates of gene flow between taxa remain extremely rare. We studied the population genetics of two taxa of the Ostrinia genus — one...

In cyclic populations, high genetic diversity is currently reported despite the periodic low numbers experienced by the populations during the low phases. Here, we report spatio‐temporal monitoring at a very fine scale of cyclic populations of the fossorial water vole ( Arvicola terrestris ) during the increasing density phase. This phase marks the transition from a patchy structure (demes) during low density to a continuous p...