Reptiles > Viperidae & Pit Vipers
The Aruba Island Rattlesnake (Crotalus unicolor), known locally as the ‘Cascabel,’ is one of the rarest and most geographically restricted viper species on Earth. Endemic strictly to a tiny, arid hilly corner of the Caribbean island of Aruba, this pale,...
Reptiles > Trionychidae & Giant Softshell Turtles
The Asian Narrow-headed Softshell Turtle (Chitra chitra), also known as the Siamese narrow-headed softshell turtle, is a titanic freshwater reptile that ranks among the largest and most critically endangered chelonians on Earth. Reaching shell lengths of up to 1.5...
Mammals > Phalangeridae & Cuscuses
The Talaud Bear Cuscus (Ailurops melanotis) is an extraordinary, critically endangered arboreal marsupial found nowhere on Earth outside the tiny, isolated Talaud Archipelago in northeastern Indonesia. Belonging to an ancient, primitive lineage of phalangerid...
Plants > Zamiaceae & Cycads
The Woolly Cycad (Encephalartos heenanii) is one of the rarest, most enigmatic, and critically threatened gymnosperm plants on Earth. Restricted to a handful of precipitous quartzite mountain ridges within the Barberton Mountainlands straddling the border between...
Birds > Accipitridae & Eagles
The Madagascar Serpent Eagle (Eutriorchis astur) is one of the most enigmatic, elusive, and critically imperiled raptors on Earth. Endemic exclusively to the dense, primary tropical rainforests of eastern Madagascar, this secretive forest hunter was feared extinct for...
