A brief update. Gorge Wildlife Park still has one elderly Rhea and they confirmed she is the last one of her kind in Australia. As I mentioned earlier in the thread, Darling Downs Zoo no longer has their elderly female (most likely passed away sometime in 2018). Time for the really sad news... I recently contacted Zoos Victoria and they informed me that their last Razor-billed Currasow (Betty) died in June 2019. The end of an era for a species no longer found in Australian zoos.