As elusive as it is charming, the black lion tamarin faces the threat of extinction. Native to Brazil, the monkeys depend on the country’s rainforest habitat for survival, so their plight worsens as more and more rainforest disappears. A successful captive breeding program for black lion tamarins in the Jersey zoo, located in the Channel Islands, offers promise for wild tamarin populations. Dominic Wormell, who runs the New World Primates section of the zoo, plays a crucial role in the plan. Working with a husband-and-wife conservation team in Brazil, Dominic will release tamarins bred at the British zoo into the wilds of Brazil. The success of the program hinges on finding just the right wild, dominant female to swap with the dominant captive female, so that once the group is released, she can lead the captive-bred tamarins in the ways of the wilderness.