Two male Black Mangabeys appear to have arrived at Cefn yr Ewr, along with a Japanese macaque.
These are both pretty rare species in the Uk so I wonder where they might have come from?
At one stage in the 1980/90's Bristol & Colchester(anywhere else?) both had groups of Black Mangabeys but they disappeared from those zoos a long while ago now. Maybe these males are the last survivors?