Gigantopithecus
Gigantopithecus (from the Ancient Greek ' "giant", and ' "ape") is an extinct genus of ape that existed from perhaps nine million years to as recently as one hundred thousand years ago, at the same period as "Homo erectus" would have been dispersed, in what is now India, Vietnam, China and Indonesia placing "Gigantopithecus" in the same time frame and geographical location as several hominin species. The primate fossil record suggests that the species "Gigantopithecus blacki" were the largest known primates that ever lived, standing up to and weighing as much as , although some argue that it is more likely that they were much smaller, at roughly in height and in weight.
Tonkin snub-nosed monkey
Sightings of the monkey have become increasingly rare. The primate was thought to be extinct until the 1990s, when a small population was discovered in Na Hang District in Tuyên Quang Province of Vietnam. Heavy poaching for food as well as the wildlife black market and the destruction of habitat are the main reasons why the Tonkin snub-nosed monkey is considered one of the planet's most critically endangered primate species .
By 2008, when a small population with three infants was discovered in a remote forest, fewer than 250 of the primates were thought to exist. In December 2013, Fauna & Flora international released the result of a population survey conducted between September and October of that year in the Khau Ca Species and Habitat Conservation Area, Ha Giang province, Vietnam. The survey identified between 108-113 individuals alive in the conservation zone, nearly half of the standing estimate for world population and the highest number at the site since populations began to be monitored. Researchers took this as an encouraging sign that conservation efforts were making an impact on the species' steeply declining numbers. The latest survey, as of November 2017, carried out by Fauna & Flora international in Khau Ca forest in April 2017 recorded at least 113-121 individuals making this area home to the largest known population of Tonkin snub-nosed monkey (Nguyen Van Truong, 2017). The famous Instagram account @SavetheSnubs has created a viral challenge using the hashtag #SnubYourselfChallenge. Millions have flocked to join in on this crazy and fun meme challenge. Youth around the world have been fighting for this important cause. Every time a challenge is posted money is donated to help save the Tonkin Snub-Nosed Monkey. For more information on the cause https://www.instagram.com/savethesnubs/