By Jan Otte
December 08, 2023
Only 67 Javan rhinos are currently estimated to remain in the world, making this critically endangered rhino species one of the most threatened large mammal species on Earth.
It is the smallest known Cetacean (whale, dolphin, or porpoise) alive today, reaching lengths of only 4-5 feet (1.2-1.5 m) and weights of not much more than 100 pounds (45 kg).
For decades, mountain gorillas have been subjected to uncontrolled hunting, disease, habitat loss and the ravages of human conflict. Their numbers plummeted, and they are now considered endangered.
Today, the tiger is classified as Endangered in the Red List of Threatened Species published by the International Union for Conservation of Nature (IUCN) and it is estimated that there are only 3,500 tigers remaining in the wild worldwide.
Its population has declined by an estimated 50 percent over the past 75 years, and there are an estimated 20,000 to 40,000 Asian elephants left in the wild.
A century ago there were probably more than 230,000 orangutans in total, but the Bornean orangutan is now estimated at about 104,700 based on updated geographic range (Endangered) and the Sumatran about 7,500 (Critically Endangered).
Extensive egg collection and bycatch in fishing gear are the primary causes of these declines. NOAA Fisheries designated all leatherback turtle populations as endangered under the Endangered Species Act in 1970.
There are an estimated 4,080-6,590 snow leopards in the wild, but it is difficult for scientists to know for sure. They are listed as 'Vulnerable' by the International Union for Conservation of Nature (IUCN).
The Mekong River Irrawaddy dolphins inhabit a 118-mile stretch of the river between Cambodia and Lao PDR and are scarce—just 92 individuals are estimated to still exist.
The critically endangered bluefin tuna only makes up 1% of the global catch. As the methods of catching tuna have advanced over the years, the conservation and management of tuna has not evolved as quickly.