The acquisition of a young female from Monarto last year indicates the intention to breed, and maintain this species in the future.Is Werribee going to maintain this species or phase them out it just seems that they are stagnating at the zoo. I wonder if the plan is to use another species once they are gone that is more tolerable.
Considering there's been no imports in the last five years at least, it indicates the group was likely related; being the former breeding male, his females and some of their offspring. The new female obviously gives the males an opportunity to breed now.