The article presents the results of a comparative analysis of post-juvenile molt in two widespread passerine species – the Willow Warbler (Phylloscopus trochilus) and the Reed Bunting (Schoeniclus schoeniclus) – in the conditions of the extreme North (Pasvik Nature Reserve, Murmansk region). The study was conducted at the Varlam Island research station in 2022–2024. Birds were captured using mist nets, followed by in vivo description.
