Werribee currently have 2 waterbuck males and 4 females on display on their lower savannah
They had 3.3 as of last year? I saw five when I visited in June.
Male Waterbuck are highly territorial, so if there’s three males on site, I’d expect at least one to be held separately from the others (if not all three held separately).
If two bulls are on exhibit together, is it a possibility one is castrated as even in a large exhibit I’d expect confrontation between two intact bulls.