The Cao Vit gibbon is a species found on the border of Vietnam and China. Only thought to number 74 in the wild (and having suffered a loss of 38% of the population in recent years, this is a little known and critically endangered species. Once thought to be a subspecies of the Hainan black crested gibbon, it was found to be far to distinct for this.

Its name is an attempt at mimicking its name.

While in the past it has been hunted, and could be the reason that the population is so low, its biggest threats at the current time, include loss of habitat, and habitat degradation for firewood.