yangtze dolphin extinct

Last year, studies shown that there are at least 35 different animals with world populations of under 1000. But which are the rarest, the animals on the brink of extinction?

The Yangtze River, or Baiji, dolphin of China is likely extinct according a conservation biologist from the Zoological Society of London. The Yangtze dolphin now has the sad distinction of being the first cetacean (whale or dolphin) species to be entirely wiped out by man.