Figure 1. Fundamental frequency of songs and range of body weights (reference IWC) for singing baleen whale species together with the excess transmission loss from absorption (α) at 10 km, 100 km and 1000 km.

[45] . A) The grey colour for bowhead whale and humpback whale mark the frequency range of harmonics. References for frequency of song: blue whale [11]; fin whale [13]; bowhead whale [24], [25], [27]; humpback whale [21], [22], [60]; and minke whale [68]. Illustrations by Uko Gorter. B) Bowhead whale Balaena mysticetus showing its tail fluke before a dive in Disko Bay, West Greenland (Photo: C. Ilmoni, Qeqertarsuaq Bowhead Research Group).