FunkyGibbon
Well-Known Member
Bristol used to have free roaming Geoffroy's Marmosets. They did quite well for a few years, and bred successfully, but were eventually confined to quarters after they went "over the wall" one day. Quite a few zoos have free ranging callitrichids as they are quite territorial and can be relied on to go home in the evening - Durrell is the most obvious one of these.
Birmingham Wildlife Conservation Park is another example of this, although I didn't actually see any Tamarins in the bit of wood where they are signposted.