Hainan gibbonThe animal lives exclusively in the trees. Considerably smaller than most apes, the gibbon, or nomascus hainanus to use the scientific name, belongs to a group known as the "lesser apes", which are smaller than the so-called great apes. Like them, it doesn't have a tail.It is rated as critically endangered by the International Union for Conservation of Nature. In the 1980s, only 10 individuals remained. The population in China now numbers 36, spread over five groups, compared with 30 in four groups in 2019 when the country started to pilot the national park system in Hainan's tropical rainforest area, according to the Hainan Department of Ecology and Environment. The pilot brought 95 percent of virgin forests, 55 percent of natural forests and all areas with key ecological functions on the island under protection, making efforts to conserve the species to an unprecedented high, the department said.Eld's deerThe number of Eld's deer in China plunged to the edge of extinction in the 1970s, with only 26 recorded. Thanks to decades of conservation and protection work, the population in Hainan has risen and in the Datian National Natural Reserve, now part of the Hainan Tropical Rainforest National Park, alone, there are over 300 Eld's deer, according to China News Service.Bawangling leopard geckoHopea hainanensisHainan gibbonThe animal lives exclusively in the trees. Considerably smaller than most apes, the gibbon, or nomascus hainanus to use the scientific name, belongs to a group known as the "lesser apes", which are smaller than the so-called great apes. Like them, it doesn't have a tail.It is rated as critically endangered by the International Union for Conservation of Nature. In the 1980s, only 10 individuals remained. The population in China now numbers 36, spread over five groups, compared with 30 in four groups in 2019 when the country started to pilot the national park system in Hainan's tropical rainforest area, according to the Hainan Department of Ecology and Environment. The pilot brought 95 percent of virgin forests, 55 percent of natural forests and all areas with key ecological functions on the island under protection, making efforts to conserve the species to an unprecedented high, the department said.Eld's deerThe number of Eld's deer in China plunged to the edge of extinction in the 1970s, with only 26 recorded. Thanks to decades of conservation and protection work, the population in Hainan has risen and in the Datian National Natural Reserve, now part of the Hainan Tropical Rainforest National Park, alone, there are over 300 Eld's deer, according to China News Service.Bawangling leopard geckoHopea hainanensis