Best Critically Endangered
The Antarctic blue whale is a subspecies of blue whale and the largest animal known to have ever existed, reaching lengths of up to 30 meters and weighing up to 180 tonnes. It inhabits the Southern Ocean, primarily feeding on krill. Its population was severely depleted by industrial whaling during t...
The Panamanian Golden Frog Atelopus zeteki is a vibrant amphibian native to Panama’s rainforests. Its striking golden coloration and unique skin secretions—containing toxins—make it scientifically valuable for studying animal defense mechanisms. Sadly, this species faces extinction primarily due to...
Giant freshwater stingray (Urogymnus polylepis) is a critically endangered species native to Southeast Asian rivers, considered one of the largest freshwater fish in the world with disc widths exceeding 2 m.
The largetooth sawfish (*Pristis pristis*) is a critically endangered species of ray belonging to the family Pristidae, found historically in tropical and subtropical coastal waters globally. It is characterized by its long, flattened snout lined with lateral teeth, which it uses to slash at schools...
The Corroboree Frog (Pseudophryne corroboree) is a small, critically endangered amphibian endemic to the Snowy Mountains of New South Wales, Australia. It is distinguished by its striking yellow and black longitudinal stripes, which serve as warning coloration to predators. Unlike many other poisono...
The smalltooth sawfish (*Pristis pectinata*) is a critically endangered species of batoid fish belonging to the family Pristidae, primarily found in the Atlantic Ocean. It is distinguished from other sawfish species by its long, blade-like rostrum, which contains 20 to 32 teeth on each side. Histori...
The Okinawa woodpecker is a rare bird species endemic to the northern part of Okinawa Island in Japan, primarily residing in the subtropical broadleaf forests of the Yambaru region. As the only extant woodpecker species native to Japan, it is officially designated as the prefectural bird of Okinawa....
The Mallorcan midwife toad (Alytes muletensis) is a small, vulnerable amphibian endemic to the Tramuntana mountains of Mallorca, Spain. It was originally described from the fossil record before living populations were discovered in 1977. Like other midwife toads, the male carries the fertilized eggs...
The northern corroboree frog (Pseudophryne pengilleyi) is a small, distinctive amphibian endemic to the high-altitude bogs and woodlands of New South Wales and the Australian Capital Territory. It is recognized by its striking yellow and black stripes, which serve as warning coloration for its toxic...
Telmatobius macrostomus, the Lake Junin Frog, is a large aquatic amphibian endemic to Lake Junin in the Peruvian Andes at approximately 4,100 m elevation. Listed as critically endangered by the IUCN, its population has declined due to water pollution from mining activities, agricultural runoff, and...
The Northern Hairy-nosed Wombat is a large marsupial native to Queensland, Australia. It’s notable as one of the planet’s most critically endangered mammal species with an estimated population of under 300. This diprotodont relies on dense scrub and sandstone ranges for survival. Zoologists, conserv...
Rana sierrae, the Sierra Nevada Yellow-legged Frog, is a federally endangered species native to high-elevation lakes and streams in California's Sierra Nevada mountains. The species has experienced population declines exceeding 90% in recent decades due to the spread of chytrid fungus (Batrachochytr...
The North Atlantic right whale is a large baleen whale species characterized by its lack of a dorsal fin and callosities on its head. Historically targeted by commercial whaling, the species remains critically endangered, with fewer than 360 individuals currently estimated to exist. These whales inh...
The mountain chicken (Leptodactylus fallax) is a large frog species native only to the Caribbean islands of Dominica and Montserrat. It is one of the largest frog species in the world, with adults reaching up to 20 cm in body length. The common name derives from its traditional use as a food source,...
The green sawfish (Pristis zijsron) is a critically endangered species of ray native to the Indo-Pacific region, inhabiting shallow coastal and estuarine waters. It is recognized by its long, narrow snout lined with sharp teeth, which it uses to stun prey and sift through the ocean floor. As one of...
The Yunnan Lake Newt (Cynops wolterstorffi) was a small aquatic salamander endemic exclusively to Kunming and the surrounding waters of Dianchi Lake in Yunnan Province, China. Males of the species displayed distinctive coloration with dark backs and bright orange undersides. Classified as extinct by...
The Baw Baw Frog (Philoria frosti) is a critically endangered amphibian restricted to the Baw Baw Plateau in Victoria, Australia. It is a terrestrial species that inhabits the alpine and sub-alpine environments of the region, typically dwelling among vegetation, logs, and rocks in moist gullies. The...
The Saimaa ringed seal is a unique freshwater seal subspecies found exclusively in Finland’s Lake Saimaa. It represents one of the last remaining landlocked seals, with a population currently below 500 individuals. This critically endangered true-seal belongs to the phocidae family and is primarily...
The Dusky Gopher Frog (Lithobates sevosus) is a critically endangered amphibian historically native to the longleaf pine ecosystems of the southern United States. Its current wild population is restricted to just a few isolated ponds in Harrison and Jackson counties in Mississippi. The frog relies h...
Turbinicarpus alonsoi is a remarkably small, globular cactus native to the Mexican state of Guanajuato. This critically endangered species is notable for its unique flattened stem shape and production of purple flowers. It represents one of Mexico’s rarest cacti and is primarily studied by botanists...
The yellow-spotted tree frog (Litoria castanea), also known as the yellow-spotted bell frog, is a large arboreal amphibian native to southeastern Australia. It is distinguished by the bright yellow spots and mottling on its inner thighs, groin, and legs. Historically, the species was found throughou...
The Maui’s dolphin is a small, coastal dolphin subspecies endemic to New Zealand’s northwest waters. It faces imminent extinction with an estimated population of under one hundred animals. This critically endangered species represents a unique genetic lineage within the delphinidae family. Conservat...
The Lake Urmia Newt (Neurergus urmianus) is a salamander in the family Salamandridae endemic to the Zagros Mountains within the Lake Urmia basin of northwestern Iran. It is an aquatic-breeding species that relies on clear, cool mountain streams and springs for reproduction. The newt faces severe pop...
Golfodulcean Poison Frog (Oophaga speciosa) is a critically endangered dendrobatid confined to a small area near Costa Rica's Golfo Dulce, making it one of the world's most range-restricted amphibians.
The whitespotted wedgefish (Rhynchobatus australiae) is a large species of ray found in coastal waters throughout the Indo-Pacific region. Reaching lengths of up to three meters, it is characterized by its distinctive white spots and shark-like appearance. This critically endangered fish is heavily...
Franklin’s bumblebee, *Bombus franklini*, is a unique bumblebee native to California poppy fields. This eusocial insect is notable for its extremely limited range and critically endangered status, representing one of the smallest bee species in North America. It primarily supports pollination within...
The Maui’s dolphin is a unique and incredibly rare dolphin subspecies. It exists only in coastal waters around New Zealand’s North Island, representing one of the world's rarest marine mammals. Fewer than sixty individuals remain, making conservation efforts vital for its survival. This critically e...
The splendid poison frog (Oophaga speciosa) is a small, brightly colored amphibian endemic to the humid lowland forests of western Panama. Like other members of the Oophaga genus, females of this species carry their tadpoles to small water pools, typically in bromeliads, and feed them unfertilized e...
The knifetooth sawfish (Anoxypristis cuspidata), also known as the narrow sawfish, is a distinct species of ray inhabiting coastal waters and estuaries of the Indo-West Pacific. It is characterized by its long, flat rostrum lined with sharp, widely spaced teeth, which it uses to slash through school...
The common skate (Dipturus batis), also known as the blue skate, is a large cartilaginous fish native to the northeastern Atlantic Ocean and Mediterranean Sea. It inhabits deep-water coastal shelves, where it preys on crustaceans and small fish. As one of the largest skate species, it can reach over...
