Exactly. I think that there is a fear that any young, active primate species will be able to escape from this enclosure, which is what happened back in the 1990's with DeBrazza's Monkeys.
This exhibit is now home to 5 male Ring-Tailed Lemurs. Adjacent to the habitat is another island with a troop of Red Ruffed Lemurs and visitors will no doubt have fun comparing the two species.
Nice addition, and will make a much better display than the two Colobus. These two leafy and green exhibits are a very nice part of Woodland Park Zoo, although with RTLs they might be a bit busier now.