Ms Mulford also spent time with a staff member who collects plastic from communities near the tamarin's forest habitats to be ground up and constructed into sustainable fence posts.
"Many of these communities don't have a service to get rid of their rubbish and recycling, so it's very common to drive past mounds of plastic waste on the side of the road.
"In the humidity, fence posts only last a few years before more trees need to be cut down to make new ones. The plastic 'Titi posts' last a long time, reducing dependency on wood. It's a fantastic initiative to reduce both waste and deforestation."
Ms Mulford was the first zoo staff member to visit the organisation. Her trip was supported by the Wellington Zoo Conservation Fund.
"I'm looking forward to sharing what I've learned about these critically endangered primates, and the communities that share their space, with both staff and visitors at Wellington Zoo," she said.
•Read more about her trip at wellingtonzoo.tumblr.com.