North Atlantic Right Whale (Eubalaena glacialis)
Listed as Endangered on the IUCNs Redlist, there are only an estimated 300-350 individuals of this species left in the ocean. Scientists from Cornell University started an experiment in December, using underwater microphones to determine the whales' position based on their vocalizations. They hope that by being abe to detect the whales' presence in real-time, they will be able to provide this information to ships, thus preventing mortality caused by collisions.
A brief article.