Critically Endangered Mammal
Gorilla
The largest living primate
Read the guideMost Endangered Animals
These are the most at-risk animals in our guide, ranked from Critically Endangered to Vulnerable on the IUCN Red List. Each faces serious threats in the wild, and each guide ends with a way to help fund their protection.
Critically Endangered 
Critically Endangered Amphibian
Axolotl
The salamander that never grows up and can regrow body parts
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Critically Endangered Fish
Hammerhead Shark
The shark with a head like a hammer
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Critically Endangered Mammal
Orangutan
The great ape of the Southeast Asian rainforest
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Critically Endangered Reptile
Gharial
The fish-eating crocodilian with a long, narrow snout
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Endangered Mammal
Tiger
The largest cat species on Earth
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Endangered Mammal
African Elephant
The largest land animal alive today
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Endangered Mammal
Blue Whale
The largest animal that has ever lived
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Endangered Mammal
Red Panda
The fiery-furred resident of the Himalayas
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Endangered Mammal
Chimpanzee
Our closest living relative
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Endangered Mammal
Sea Otter
The tool-using keystone of the kelp forest
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Endangered Reptile
Komodo Dragon
The largest lizard on Earth
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Endangered Reptile
Green Sea Turtle
The gentle, long-lived grazer of tropical seas
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Endangered Fish
Whale Shark
The largest fish in the world
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Endangered Fish
Shortfin Mako Shark
The fastest shark in the ocean
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Endangered Bird
African Grey Parrot
One of the most intelligent talking birds
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Endangered Fish
Manta Ray
The gentle giant that flies through the sea
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Endangered Amphibian
Goliath Frog
The largest frog on Earth
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Vulnerable Mammal
Lion
The social big cat of the African savanna
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Vulnerable Mammal
Giant Panda
The bamboo-eating bear of China's mountains
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Vulnerable Mammal
Giraffe
The tallest animal on Earth
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Vulnerable Mammal
Leopard
The stealthy, tree-climbing big cat
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Vulnerable Mammal
Polar Bear
The largest land carnivore, ruler of the Arctic
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Vulnerable Mammal
Cheetah
The fastest land animal on Earth
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Vulnerable Mammal
Koala
Australia's iconic eucalyptus-eating marsupial
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Vulnerable Mammal
Snow Leopard
The elusive ghost of the mountains
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Vulnerable Mammal
Hippopotamus
Africa's deadliest large land mammal
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Vulnerable Reptile
King Cobra
The world's longest venomous snake
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Vulnerable Insect
Monarch Butterfly
The insect that migrates thousands of miles
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Vulnerable Fish
Seahorse
The tiny fish where fathers give birth
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Vulnerable Fish
Betta Fish
The colorful fighter of Southeast Asian waters
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Vulnerable Reptile
Galápagos Tortoise
The giant tortoise that can live over a century
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Vulnerable Bird
Snowy Owl
The white owl of the Arctic tundra
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Vulnerable Fish
Bull Shark
The shark that swims into freshwater
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Vulnerable Invertebrate
Atlantic Horseshoe Crab
The ancient living fossil with blue blood
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Vulnerable Bird
Atlantic Puffin
The colorful 'sea parrot' of the North Atlantic
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Vulnerable Invertebrate
Giant Clam
The reef-dwelling giant of the mollusks
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Vulnerable Amphibian
Hellbender
North America's giant, fully aquatic salamander
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