One of my first post at Zoochat (Zoobeat) was about a idea for a new exhibit for GHLT, so free ranging was taking in count and here are the results. Its a area of 1 ha, with 3.1.2 individuals.
Service area.
The holding area is only for feed and the next boxes, the tamarins are only closed for health checks, etc, otherwise they are allowed to roam free 365 days/ year.