A handout picture made available by Australia's Taronga Zoo shows an orphaned Brushtail Possum joey nicknamed 'Bettina' at Taronga Zoo in Sydney, 06 October 2015. Zoo keeper Felicity Evans has taken on the role of surrogate mother to the four-month-old possum, carrying a makeshift pouch and waking in the middle of the night to bottle feed and toilet the joey. (Photo by EPA/Taronga Zoo)
