Figure 6
From: Humpback whale song recordings suggest common feeding ground occupation by multiple populations
Schematic illustration of spectrogram visualizations of the preliminary humpback whale song 2 (HWS2) and complex humpback whale song 1 (HWS1) categories. HWS2 is defined as a vocalization sequence organized in at least three repeated, similar phrases and HWS1 is defined as a vocalization sequence organized in at least two different themes (see26 for details on phrase and theme delineation).
