Some animals that are included on the endangered species list are the western lowland gorilla, the leatherback turtle and the Amur leopard. As of 2015, these animals are categorized as critically endangered by the International Union for Conservation of Nature.
The western lowland gorilla inhabits the dense rainforests of western Africa. Due to the gorillas' remote habitat, their population numbers are unknown. However, International Union for Conservation of Nature officials speculate that nearly 60 percent of the gorilla population died or was killed between the early 1990s and 2015.
The leatherback turtle is the largest species of turtle, reaching lengths of 55 to 63 inches and weighing between 600 and 1,500 pounds. The turtles are mainly found migrating throughout the Atlantic and Pacific Oceans. The IUCN categorizes the species as vulnerable on a global scale; however, subpopulations found in the Pacific and southwest Atlantic are considered critically endangered.
The IUCN estimates that there are only 60 Amur leopard individuals left in the wild. The leopards are normally found in the temperate forests and mountains of eastern Russia. The leopards weigh between 70 and 105 pounds, can reach speeds up to 37 miles per hour and can jump up to 10 feet high.