The Hector's dolphin is the world's smallest dolphin and found only in New Zealand. There are about 7400 Hector's dolphins, but only 55 Maui's dolphins (a genetically distinct subspecies)left. Most of the sounds they make are high frequency clicks about 6 times above human hearing. This Hector's dolphin is a collection by Antics featuring birds, reptiles and marine mammals from New Zealand and their sounds.