A hidden colony of endangered yellow-tailed woolly monkeys was recently discovered in Peru.
The colony was found by a team of international researchers from Neotropical Primate Conservation, a U.K.
charity. The yellow-tailed woolly monkey (Oreonax flavicauda) is native to a small part of the Andean cloud forest in northeastern Peru, and is so rare that it was thought extinct until a few sightings in the mid-1970s.
A monkey with a bright yellow tail would seem easy to find, but studying this species has been nearly impossible.
Not only does the yellow-tailed woolly monkey live in the remote valleys and steep mountains of Peru, but their home is also cocaine country and a former stronghold of Communist guerrillas...