Mapinguari — Giant Sloth Cryptid of the Amazon Reported by Indigenous and Scientists Alike

The mapinguari is a large, powerful cryptid reported from the Amazon basin of Brazil and Bolivia, described by indigenous peoples as a reddish, bear-like or ape-like animal standing seven to eight feet tall, with thick hide, backward-facing feet, long curved claws, and a nauseating odor. Unlike most cryptids, the mapinguari is taken seriously by several mainstream paleontologists.

Accounts from indigenous communities throughout the Amazon Basin are ancient and consistent, describing an animal that could rip apart palm trees, was nearly impervious to bullets, and had a single eye or a mouth in its stomach in some tellings. Explorers and naturalists documented similar accounts beginning in the 19th century.

The most compelling scientific argument for the mapinguari involves the ground sloth Megatherium and related species. Giant sloths went extinct across most of the Americas approximately 10,000 years ago but may have survived longer in the isolated interior of the Amazon. Their physical characteristics — large size, thick hide that included bony nodules, enormous curved claws, and strong odor from glands — match mapinguari descriptions closely.

Biologist David Oren of the Brazilian National Museum conducted expeditions into the Amazon in the 1990s specifically searching for the mapinguari, collecting hair samples and testimony from indigenous witnesses. DNA analysis of hair samples was inconclusive. No specimen has been documented, but the alignment between fossil evidence and cryptid descriptions has made the mapinguari one of the more scientifically credible cryptozoological cases.