Hi, Thomas, I might have interesting material for you in this regard. Black lion tamarin is only kept by six zoos in the world, being only one of them outside of Brazil: Jersey zoo (Durrel), in your country. Here follows some of the black lion tamarin exhibits I have seen in person and photographed, both of them in the two institutions that most breed the species in BR:
Exhibit for black lion tamarin at São Paulo Zoo, the main breeder of the species. The zoo was the first to establish the conservation program for the species, back in XX century. (Photo taken in october 2020).
Exhibit for black lion tamarin at Belo Horizonte zoo, wich also breeds the species very well (Photo taken on april 2021, although the exhibit keeps the same in all my visits since then). This exhibit, like all the other small primate enclosures at the place, are particularly interesting, for being located in a considerably big fragment of atlantic forest.
The species is (or was) also kept in São Carlos zoo (smaller city located near São Paulo), the Rio Primate center, and maybe at the Pomerode zoo, afaik. I haven't visited these yet, but the info I have to the moment is that none of these three have achieved to breed the species.
