The geographer Maan Barua noted that metaphors influence what people understand and how they act; that mammals are disproportionately chosen; and that biologists need to come to grips with language to improve the public's knowledge of conservation.[1] Several definitions have been advanced for the flagship species concept and for some time there has been confusion even in the academic literature.[2] Most of the latest definitions focus on the strategic, socio-economic, and marketing character of the concept.[2][3] Some definitions are: