Abstract
The Caquetá titi Monkey (Plecturocebus caquetensis) is a critically endangered primate due to the increasing loss of its habitat. In recent years, studies of their behavioral ecology have increased; but little is known about their reproductive behavior. Here we report the first records of reproduction and the birth of one individual of P. caquetensis in each of two observed groups in a forest fragment in Caquetá - Colombia in October 2013. We record the attack of a Pithecia milleri on the adult male while carrying the newborn. These records represent a contribution to the natural history of this endangered species.
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