Highly agree amigo, They (Perth Zoo) have done amazingly in their time, considering one of the few zoos in Australia that has never held Gorillas for example, but yet they have done amazingly, especially with Western Australian based threatened species, and also many endangered primates too (and many other examples). Their former species inventory is very impressive, even if they have never held Gorillas or say Snow Leopards they have had an impressive history (bad times too like all zoos with a history of note, but they are well regarded by their gardens and landscapes, care of their animals in the last 40 years of more admiring note like most zoos..the African Savannah is only the most famous achievement of many).