Interesting fact: In 1927 Harvey Firestone (who owned a large rubber plantation in Liberia) gave President Calvin Coolidge a male pygmy hippo named Billy as a gift. Billy is the ancestor to almost all pygmy hippos living in American zoos.
The Pygmy Marmoset is the smallest living monkey. Its head and body length varies from 117-152 mm and its tail length varies from 172-229 mm. That’s a total length of around 13 inches on average. The adult weight is in the range 85-140 grams or approximately four ounces on average. Its tawny coat is sprinkled with gray and its tail is ringed. Long hairs on its head and cheeks form a mane which hides its ears. Its eyes are almond-shaped. It lives in the upper Amazon regions of South America, Colombia, Peru, Ecuador, Bolivia and Brazil.
The Pygmy Shrew, which is only about 90 mm (3.5 in) in total length, has the distinction of being one of the smallest mammals in the world.