Wow great to have them back in the country again, such great primates I remember seeing them at Melbourne zoo years ago.
Disappointed that there is only a pair though it's not exactly a sustainable population long term.
Apparently going back to the 1980’s, De Brazza’s monkeys were believed to be monogamous, but now it’s recognised they’re a polygamous species.
Looking at EAZA data they only had 51 males, 68 females and 7 unsexed juveniles (126 individuals) spread over 29 institutions in 2019. This suggests most zoos only had a pair or trio and the average group size was four (most likely including offspring). With this in mind, a pair is a reasonable starting point.
Taking into account the 12 month birth interval, I’m confident this pair will produce enough offspring to supply a few zoos in region; ideally combined with the import of a second pair to produce some first generation pairings.