Singing humpback whale by Tony Wu There are many ideas for why humpback whales spend so many hours every day singing their complex songs on the mating grounds. Could it be related to how Red Deer (UK) / Elk (US) have roaring contests? Is it for males to evaluate each other's strength and endurance, to avoid a fight with a stronger, more fit male, thereby risking injury? However, if that is the case, why do you often see surface active groups on the mating grounds, where many
