Amur leopard: the world's rarest cat?

Today, African forest elephants occupy around 25% of their historic range, scattered among 20 different African nations, mostly in Gabon and the Republic of Congo.

9. SUMATRAN ORANGUTAN
The Sumatran orangutan is found exclusively on the island of Sumatra, Indonesia. They are listed as critically endangered by the IUCN at present, with less than 14,000 individuals in the wild.
Sumatran orangutans face similar threats (https://www.wwf.org.uk/learn/fascinating-facts/orangutans#:~:text=It%27s%20estimated%20that,amount%20of%20oil.%C2%A0) to their Bornean and Tapanuli counterparts. From logging, agricultural plantations, and expanding infrastructure development to the illicit pet trade.
Orangutans need vast tracts of connecting forest to live in but between 1985 and 2007 these great apes lost 60% of their forest habitat. Today the majority of these orangutans are found in the northernmost tip of Sumatra in the Leuser Ecosystem, a landscape that includes tropical lowland rainforests and steamy peatland swamps.
WWF (https://www.wwf.org.uk/learn/fascinating-facts/orangutans)
Top 10 facts about orangutans | WWF
There are three species of orangutans in the world - The Bornean, the Sumatran and the recently confirmed new species (as of 2017), the Tapanuli.

10. BLUE WHALE
Fewer than 25,000 blue whales (https://www.britannica.com/animal/blue-whale), the largest animals on the planet, survive today. Comprising several subspecies, blue whales are found in all of the world’s oceans save the Arctic. The current population is thought to have been reduced by up to 90 percent by whaling in the 20th century. Commercial hunting of the species was ultimately banned in 1966. The U.S. National Marine Fisheries Service spelled out a recovery plan in 1998. It stipulated the maintenance of photo databases of individual specimens and the collection of genetic and migration data in order to better understand the species, which remains at risk from ship collisions and entanglement in fishing nets.
Blue whale | Facts, Habitat, & Pictures
Blue whale, a species of baleen whale, a cetacean, that is the most massive animal ever to have lived. Weighing approximately 150 tons, it may attain a length of more than 30 meters (98 feet). Blue whales..