A great species, and one with which I am very fond; sadly it is also declining rather badly in European collections. How many are held at the collection?
Yeah, this is always the issue it is reliant on people keeping it up-to-date, which is partially why I hoped you might know more accurate information so that I could update it.
Apenheul indeed has 2.2, two breeding pairs that is. Because the females don't get along very well, they decided on rotating the exhibit between the two pairs every few days I believe. Sadly no offspring since hand-fed Bob in 2009. However, one of the females gave birth to a stillborn last year, showing she is capable of breeding so fingers crossed for next year.