Asian colobine monkeys are unable to taste natural sugars, and in fact have a generally poor sense of taste. This is according to research led by Emiko Nishi of the Primate Research Institute of Kyoto University in Japan. Nishi and her colleagues found that the receptors on the tongues of colobine monkeys do not function in the same way as for fruit-eating monkeys, who are sensitive to sweet tastes. The study is published in the Springer Nature branded journal Primates, which is the official journal of the Japan Monkey Centre.