Which whales are nicknamed 'sea canaries' because of their birdlike sound?
Beluga whale maximum frequency of 100 to 120 kHz when transferred to Kaneohe Bay in Hawaii. The difference in frequencies is thought to be a response to the difference in environmental noise in the two areas. These animals communicate using sounds of high frequency; their calls can sound like bird songs, so belugas were nicknamed "canaries of the sea". Like the other toothed whales, belugas do not possess vocal cords and the sounds are probably produced by the movement of air between the nasal sacks, which are located near to the blowhole. Belugas are among the most vocal cetaceans. They use their
Doubtful Sound Orcas (killer whales) and long-finned pilot whales can be found also. The waters of Doubtful Sound are also home to an abundance of sea creatures, including many species of fish, starfish, sea anemones, and corals. It is perhaps best known for its black coral trees which occur in unusually shallow water for what is normally a deep-water species. The sound has been identified as an Important Bird Area by BirdLife International because it is a breeding site for Fiordland penguins. Secretary Island and Bauza Island are some of the most important sanctuaries in New Zealand for critically endangered birds. Deep