As of December 2014, the rarest animals on earth are the ivory-billed woodpecker, Amur leopard, Javan rhino, numbat, northern sportive lemur, western lowland gorilla, saola, leatherback sea turtle, tiger and the Chinese ... More »

All species of gorillas are becoming endangered and potentially extinct due to habitat loss, disease and poaching. A gorilla's only natural predator in the wild is the leopard. More »

Given that the Earth has experienced no fewer than six mass extinctions over the last 500 million years, the list of species that once lived but have gone extinct over the ages is vast. As of 2014, the Center for Biologi... More » Science Biology Zoology

Among the most threatened species of animals worldwide are the ivory-billed woodpecker, Amur leopard, North Atlantic right whale, black rhino, Javan rhino, mountain gorilla, Cross River gorilla, tiger (including all subs... More »

As of 2015, animals listed as endangered by the World Wildlife Fund include the Amur leopard, black rhino, leatherback turtle, western lowland gorilla and North Atlantic right whale. Among the factors that cause these an... More » Science Biology Zoology

Some of the most endangered animals in the world are the ivory-billed woodpecker, the western lowland gorilla, the leatherback sea turtle, the tiger and the Chinese giant salamander. Other endangered animals include the ... More » Pets & Animals Animal Reproduction

There are not seven levels of tiger classifications or subspecies but six, and they are the Sumatran, Amur, Bengal, Indochinese, South China and Malayan tigers. In addition, three other subspecies became extinct in the 2... More »