Australian zoo celebrates Christmas

Christmas has come early for animals at Taronga Zoo in Sydney, Australia. Some of the zoo's most famous residents got into the festive spirit with some merry treats in gift bags.

A wallaby checks a bag full of fruit and nuts as animals at Taronga Zoo in Sydney, Australia, receive special Christmas treats that  encourage them to forage, Wednesday, Dec. 23, 2009. The activities  are design to arouse the animals' inquisitiveness and stimulate  their natural behaviors.(AP Photo/Rick Rycroft)

Kangaroos and wallabies enjoyed peanut butter-topped pine cones, while a Sumatran tiger discovered a big piece of meat inside her Christmas gift bag. Meanwhile, the zoo's elephants wrapped their trunks around jumbo-sized ice pops filled with fruit. The gifts are part of the zoo's "behavioral enrichment program", which focus on the social health of the animals.