Scientists looking for a rare Chinese river have concluded after a six week search that it is likely to be extinct. The last time the dolphins were counted was in 2006 when only 17 individuals were found. This time when scientists looked for the dolphins they found none at all. If the dolphin is now extinct it will be the first large vertebrate to become extinct for 50 years. Scientists had hoped to find some Yangtze river dolphin’s to transfer them to a protected breeding program but it appears they are too late.