These are great photos @KevinB and L'Hoest's Monkeys have been incredibly rare for me. In visits to more than 600 different zoos and aquariums, I've only ever seen this species TWICE in my lifetime. Once was at San Diego Zoo in 2008 and the other time was at Apenheul in 2019 when they were in with the Gorillas. Super rare primates in captivity.