As L.A. resident sues zoo over Billy and Tina, Cher says elephants have 'served their time' / 'Extremely rare' fawn successfully bred at zoo / Zoo gets its own Moo Deng and launches poll to name baby pygmy hippo / Star crocodile from hit film Crocodile Dundee dies peacefully, zoo says / Meet world's oldest cockatoo Cookie who performed at zoo for 75 years - but pink parrot's exact age will never be known / Python moved from New York home to zoo after growing too long / '1000-Lb. Sisters' star Amy Slaton left zoo on stretcher before arrest, after alleged camel bite / London Zoo Removes Banksy's Gorilla Artwork for 'Safekeeping' and Thanks Him for 'Putting Wildlife in the Spotlight' / Chimpanzee holds her dead baby for months at zoo / Crowds throng zoo; more visitors expected for next two days