1. Northern White Rhinoceros (Ceratotherium simum cottoni): There are only two known remaining individuals of this subspecies, both of which are in captivity.
2. Sumatran Rhino (Dicerorhinus sumatrensis): Fewer than 80 individuals remain in the wild, fragmented across several locations in Sumatra, Indonesia.
3. Amur Leopard (Panthera pardus orientalis): Estimated population size is around 90 individuals, found only in a small region in eastern Russia and northeast China.
4. Cross River Gorilla (Gorilla gorilla diehli): One of the most critically endangered primates, with an estimated population of around 300 individuals restricted to a single location in Nigeria and Cameroon.
5. Mountain Gorilla (Gorilla beringei beringei): Around 880 mountain gorillas remain, found in the Virunga Mountains of the Democratic Republic of Congo, Uganda, and Rwanda.
6. Javan Rhino (Rhinoceros sondaicus): Only around 67 Javan rhinos survive in Ujung Kulon National Park in Java, Indonesia.
7. Sumatran Tiger (Panthera tigris sumatrae): Subsisting population of approximately 400 individuals, confined to the island of Sumatra.
8. Hawksbill Turtle (Eretmochelys imbricata): Critically endangered sea turtle species, facing threats from hunting and habitat loss.
9. Giant Panda (Ailuropoda melanoleuca): Despite conservation efforts, the wild population is estimated to be around 1,864 individuals, concentrated in the mountains of central China.
10. Saimaa Ringed Seal (Pusa hispida saimensis): A subspecies of ringed seal found in Finland and Russia, with a population estimated at 400 individuals.