A bird covered in spilled oil perches on the banks of the San Juan river in Cadereyta August 26, 2014. An oil pipeline spill that contaminated the river in the northern Mexican state of Nuevo Leon will take months to clean up, the country's top water authority said on Thursday. The 24-inch Madero-Cadereyta pipeline, owned by national oil company Pemex, was ruptured when thieves attempted to tap into it, the company said on Sunday. REUTERS/Daniel Becerril (MEXICO - Tags: ANIMALS DISASTER ENVIRONMENT BUSINESS ENERGY)