Did you know...
"It turns out that bowhead whales change their songs from year to year and never repeat songs from previous years. I.e. the whales have a new repertoire each year - presumably as part of the eternal struggle to obtain a mate,” said Outi Maria Tervo, PhD student and current scientific leader and the university’s field station in the town of Qeqertarsuaq (Godhavn) on Disko Island.
Sounds like humans don't have a monopoly on creativity, or an interest in novelty. Whales have to be pretty smart to be able to continuously generate new songs. It'd be interesting to know what these songs actually communicate...
http://www.sciencedaily.com/releases/2009/07/090729074523.htm