TUCSON, Ariz. -- Pima County, Arizona, authorities said four emus that got loose in a neighborhood on Tucson's southwest side were captured. The four large birds were contained Thursday. County sheriff's officials said two of the emus had been returned to their owner and were back in their pen. They said the other two emus were taken back to their owner in a horse trailer. The emu is the largest bird native to Australia and the second-largest bird in the world, behind the ostrich.