The Yangtze dolphin may be extinct

Aka. the Baiji, these fresh water dolphins only live in the Yangtze river, China's longest, and a 26-day, 1700-km (1,060-mile) hunt by experts failed to find any of the mammals.

http://news.yahoo.com/s/nm/20061202/sc_nm/environment_china_dolphin_dc

Update: http://baiji.org/ - new web site to help in case there's still a chance.

The search found about 300 of another threatened species, the Yangtze finless porpoise, but this was less than expected.

Update: Opinion of the Christian Science Monitor, December 21, 2006, http://www.csmonitor.com/2006/1221/p08s02-comv.html