@Neil chace: I came up with the longtailed macaques because I thought they are still available in the US, not from zoos but from pharma institutions (and zoos could be a retirement place then). But if they aren't available (anymore) even from such institutions, then yes, it won't make sense (specially because their "conservation value" is much lower then the one of Lion-tailed macaques or Sulawesi crested macaques). However, I wish the responsible people would at least one tropical macaque species cancel from their phase-out list