title: Travelling across subspecies borders: songs and calls of the Common Chaffinch <i>Fringilla coelebs</i> in the contact zones and adjoining areas of southern Russia
abstract: Capsule Although many acoustic signals of Common Chaffinches Fringilla coelebs, including both songs and rain calls, are widespread across its distribution range, the boundaries between subspecies place formidable obstacles to the spread of vocal patterns.Aims To investigate the diversity of song types and song structure of rain calls in the contact zone between the Caucasian and Crimean subspecies of Chaffinches in the north-western Caucasus, as well as between the nominate and Caucasian subspe
journal: Bird Study