Some past collections that I miss include the Old world primate collections at San Francisco Zoo, San Diego Zoo, and Louisiana Purchase Zoo and Gardens from back in the 1970s and 1980s. San Diego Zoo had 7 species of langur at one time and at that time with some cool species including Nilgiri langur, East javan silver langur, Southern dusky langur, Thailand banded langur, Indian hanuman langur, East borneo proboscis monkey, and Red-shanked douc langur. at that time San Francisco Zoo had 8 species of macaque, they had Burmese pigtail, Malayan pigtail, Rhesus macaques, Stump tailed macaques, Barbary macaques, Lion tailed macaque, Celebes crested macaque and Moor macaque. The Louisiana Purchase Zoo and Gardens at that time had 6 or 7 species of Guenon, they had Schmidts' spot-nosed guenons, Moustached guenons, DeBrazzas guenons, Diana monkeys, Stuhlman's guenons, and White throated guenons.