Liberty Mutual is taking a page from its insurance peers Geico and Farmers by featuring an animal in its marketing. This week, the Boston-based brand is debuting "LiMu Emu and Doug," its new feathered mascot and his moustached partner, as a pair of bumbling '70s-style detectives keen on making sure Liberty customers get the most out of their insurance. The duo star in a series of buddy-cop spots to push out the message that Liberty offers customized insurance where customers only pay for what they need.