A new Amazon monkey species was discovered in Colombia, and researchers said they believe the small, isolated population is at risk due to the cutting of forests that are its home.

The find was announced by Conservation International, a group that helped finance the research in remote rain forests that until recently were considered too dangerous for scientific work due to the presence of leftist rebels.

A team of researchers from the National University of Colombia observed 13 groups of the new species – dubbed the Caqueta titi monkey because it was found in the southern state of Caqueta, near Peru.

The researchers, who published their findings in the journal Primate Conservation, believe the species may be critically endangered.

They estimate less than 250 of the monkeys exist and say the felling of forest for agriculture threatens their habitat.