Endangered Species

Loxodonta africana

The African elephant is the largest living land animal, roaming savannas, forests, and semi-arid regions across sub-Saharan Africa in tightly-bonded matriarchal herds. This entry refers specifically to the African bush elephant, the larger of two African species recognized by the IUCN since 2021 — the other, the African forest elephant, is smaller, has straighter tusks, and lives in the dense rainforests of Central and West Africa. Elephant populations were decimated by ivory poaching through the 20th century, and though international trade bans and anti-poaching efforts have slowed the decline in many regions, habitat loss and human-wildlife conflict continue to threaten the species today.

Panthera tigris tigris

The Bengal tiger is the most numerous tiger subspecies, with India alone holding the large majority of the world's wild tiger population, and it is the largest wild cat native to Asia's forests, mangroves, and grasslands. Smaller populations also survive in Bangladesh, Nepal, and Bhutan, including in the Sundarbans, a vast mangrove delta shared by India and Bangladesh where tigers are unusually strong swimmers and sometimes hunt aquatic prey. India launched Project Tiger in 1973 to protect the subspecies through a network of dedicated reserves, and the country's wild tiger population has grown substantially since, even as poaching for the illegal wildlife trade and habitat fragmentation remain serious ongoing threats.

Balaenoptera musculus

The blue whale is the largest animal known to have ever existed — larger than any dinosaur — filtering enormous quantities of tiny krill from the ocean through comb-like baleen plates as it roams nearly every ocean on Earth except the high Arctic. Populations were driven to the edge of extinction by 20th-century commercial whaling before international protections took hold; an estimated 10,000 to 25,000 remain today, a small fraction of pre-whaling numbers.

Mobula birostris

The giant oceanic manta ray is the largest ray species in the world, with a wingspan that can reach up to 7 meters across. Despite its enormous size, it feeds exclusively on some of the ocean's smallest organisms, filtering huge volumes of zooplankton through specialized gill plates as it swims.

Phyllobates terribilis

The golden poison frog is widely regarded as the most toxic animal on Earth by weight, native to a small stretch of Colombian rainforest.

Phascolarctos cinereus

The koala is a tree-dwelling marsupial native to Australia, spending nearly its entire life in eucalyptus trees on a diet that would be toxic to most other mammals.

Varanus komodoensis

The Komodo dragon is the largest living lizard species in the world, found only on a handful of Indonesian islands including Komodo, Rinca, and Flores. A powerful apex predator, it can take down prey as large as water buffalo using a combination of a powerful bite, sharp serrated teeth, and a toxic bite that impairs its victim.

Danaus plexippus

The monarch butterfly is famous for an extraordinary multi-generational migration spanning thousands of kilometers between Canada, the United States, and central Mexico.

Gorilla beringei beringei

The mountain gorilla is a critically-studied great ape subspecies living in the misty forested slopes of the Virunga Mountains and Bwindi in central Africa, and one of conservation's most notable recovery stories.

Myrmecobius fasciatus

The numbat is a small, striped marsupial from Western Australia and one of the very few marsupials active exclusively during the day. Unlike most marsupials, it feeds almost entirely on termites, using an extremely long, sticky tongue to extract thousands of them from tunnels and rotting wood each day.

Okapia johnstoni

The okapi is a shy, elusive relative of the giraffe found only in the dense rainforests of the Democratic Republic of the Congo. Despite its zebra-striped legs, it is not related to zebras at all -- the stripes are thought to help camouflage it in dappled forest light and help calves follow their mother through dense vegetation.

Ailurus fulgens

The red panda is a small, tree-dwelling mammal native to the temperate forests of the eastern Himalayas and southwestern China, spanning Nepal, Bhutan, India, and Myanmar. Despite the shared name and bamboo-heavy diet, it is unrelated to the giant panda — the two evolved their bamboo-eating habits and thumb-like wrist bone independently, a striking example of convergent evolution.

Enhydra lutris

The sea otter is the heaviest member of the weasel family and one of the few mammals known to use tools, cracking open shellfish with rocks while floating on its back.

Sarcophilus harrisii

The Tasmanian devil is the largest surviving carnivorous marsupial in the world, now found only on the Australian island of Tasmania after going extinct on the mainland centuries ago. Despite its stocky, unassuming build, it has one of the strongest bites relative to body size of any living mammal, capable of crushing bone.

Stegostoma tigrinum

The zebra shark is a docile, bottom-dwelling shark of the Indo-Pacific, named for the dark stripes seen in juveniles that fade into a spotted pattern as adults.