Humboldt's squirrel monkey

Humboldt's squirrel monkey (Saimiri cassiquiarensis) is a species of squirrel monkey from Brazil, Colombia, Ecuador, Peru and Venezuela. It was previously treated as a subspecies of the common squirrel monkey until a 2009 genetic study by Carretero-Pinzón raised it to a full species, and the Ecuadorian squirrel monkey is now generally regarded as its subspecies. It has a head and body length of 25 to 37 cm and a tail of 36 to 45 cm. Its coloration is similar to that of the Guianan squirrel monkey, but the fur at the base of the crown is golden yellow where the Guianan squirrel monkey's is gray. It eats fruits when available, primarily between January and June, and also eats insects. It is named after the Prussian naturalist and explorer Alexander von Humboldt.