The document discusses several critically endangered animal species, including the Amur leopard (of which only 30 remain), giant panda (with 1,800 left in the wild), and leatherback sea turtle (threatened by plastic in the oceans). It also mentions the extinction of the dodo bird and declines of species like the Chinese giant salamander due to habitat loss, pollution, hunting, and use in Chinese medicine. Of particular concern are great apes like the Sumatran orangutan, African elephant, and tiger, with only around 3,200 tigers remaining in the wild. Various human activities are driving many species to the brink of extinction.