A 'purring' monkey (Callicebus caquetensis)  – Colombian Amazon
  
The new species, named the Caqueta titi monkey or Callicebus caquetensis,
 is one of about 20 species of titi monkeys, which all live in the 
Amazon basin. The population size has been estimated at less than 250 
individuals, and its habitat has been fragmented by clearing for 
agricultural land. It is classified  as critically endangered by the 
IUCN. According to scientists, titi monkeys are among the few species of
 primates that are monogamous. 'All of the babies purr like cats too,' 
said Thomas Defler, who was part of the team that discovered the 
species. 'When they feel very content they purr towards each other, and 
the ones we raised would purr to us' |