“…The degree of difficulty to reintroduce an infant depends on the length of separation and the number of adult individuals in a group. The separation of the neonate from its mother may be brief and last just a few days (Keiter et al, 1983) or even a few hours (Barnes, 2012), in which case reintroduction is straightforward because the mother is still lactating and may accept to take her offspring back. Most reintroductions described in the literature involve small captive groups of no more than a few adult females and/or one adult male, plus immature individuals (Meyer and Wilcox, 1982;Dronzek et al, 1986;Visalberghi and Riviello, 1987;Watson and Petto, 1988;Sodaro, 1993a, b;Sodaro and Weber, 2000;Abellò et al, 2007;Cross, 2007;Abellò and Collel, 2009;Barnes and Cronin, 2012).…”