Updates on the contact zone between two mimics: Melodious and Icterine Warblers

摘要

The case of the two mimics Melodious and Icterine Warblers in sympatry in the context of a mobile hybrid zone is especially interesting from the evolutionary ecology viewpoint. The works of Camille FERRY have brought to light a wealth of key knowledge on the ecological and behavioural context of the sympatric life of both species and initiated several studies dedicated to the morphological and vocal consequences of sympatry of both mimics. These studies highlight morphological changes in H. icterine towards greater similarities with H. polyglotta as well as convergences in the songs of both species in areas of sympatry. Moreover molecular analysis have proven the uncommon occurrence of hybrids and introgression between both species in and around the sympatry.