 In December 2006, the Yangtze river dolphin was declared functionally extinct after an extensive search of the river revealed no signs of the dolphin's inhabitance.In 2007, a large, white animal was sighted and photographed in the lower Yangtze and was tentatively presumed to be a "baiji".However, as there have been no confirmed sightings since 2004, the "baiji" is presumed to be functionally extinct at this time.