Keepers at an Australian wildlife park Wednesday said they were concerned and baffled at the theft of an emu in a night raid, saying it would be frightened and possibly injured. The tall female bird was discovered missing from Featherdale Wildlife Park in Sydney's western suburbs early Tuesday. Her enclosure contained a large quantity of feathers, indicating a struggle. "It looks like the emu may have sustained injuries during the theft," park curator Chad Staples said in a statement.