Magnúsdóttir EE, Lim R. Subarctic singers: Humpback whale (Megaptera novaeangliae) song structure and progression from an Icelandic feeding ground during winter Sakata JT, cur. PLOS ONE. 2019;14(1):e0210057. Available at: http://dx.plos.org/10.1371/journal.pone.0210057.