a new population of Tonkins was discovered earlier this year, so numbers are a bit better than thought: http://www.zoochat.com/65/new-population-tonkin-snub-nosed-monkeys-273655/Even though the population size is still an estimate, it's still larger than the Tonkin snub-nosed monkeys. Theres a lot more hope with these if there estimate might be correct than the tonkins, which are around 70-110.