For the second time in less than two weeks, thieves broke into a locked cage and stole a rare bird from the San Diego Zoo. The stolen 30-year-old male African bateleur eagle had lived at the zoo since 1961. On June 3, a female African milky eagle owl was stolen from a cage about 100 yards away. Zoo officials said the thefts apparently were well planned by someone with specific knowledge about the birds. There was no evidence the thefts were committed by the same people.