There's a whale wandering around the Pacific on his/her own, calling in a voice unlike any other whale's. Not much info to be had; here's the whole article by Rhiannon Edward in the Scotsman (the story is from the Dec 11 issue of New Scientist but it's not in the online version):

A LONE whale with a mysterious voice that matches no other species has been discovered roaming the Pacific, it was revealed yesterday.

The whale has been wandering across the ocean for the past 12 years. Researchers identified it after listening to recordings made by the United States Navy’s submarine-tracking hydrophones.

Mary Ann Daher, a marine biologist at the Woods Hole Oceanographic Institution in Massachusetts, used the partly declassified records to trace the movements of whales in the north Pacific. They show that one whale singing at a frequency of about 52 hertz has cruised the ocean every autumn and winter since 1992.

Its calls do not match those of any known species, though they are clearly those of a baleen, the family that includes blue, fin and humpback whales.

Blue whales typically call at frequencies between 15 and 20 hertz. They do use some higher frequencies, but not 52 hertz, New Scientist magazine reported.

The tracks of the lone whale also do not match the migration patterns of any other species.

New Scientist reported: "Over the years, the calls have deepened slightly, perhaps because the whale has aged, but its voice is still recognisable. Ms Daher doubts that the whale belongs to a new species, although no similar call has been found anywhere else, despite careful monitoring."

Whales of most species spend considerable time alone, so a solitary whale is not unusual, and even if though this one has never been recorded together with any other calls that doesn't mean he/she is always alone. Nonetheless, it's difficult to resist anthropomorphising and feeling sad for the poor lonely whale with the odd high-pitched voice. (Updated 041210. Abstract in Deep Sea Research is here.)