<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> This is a collection of lists of mammal species by estimated global population, divided by orders . (Lists only exist for some orders; e.g. the most diverse order - rodents - is missing .) Much of the data in these lists were created by the IUCN's Global Mammal Assessment Team, which consists of 1700 mammalogists from over 130 countries . They recognize 5488 species in the class . </P> <P> These lists are not comprehensive, as not all mammals have had their numbers estimated . For example, a live specimen of the spade - toothed whale was first observed in December 2010, and the event only recognized as such in November 2012; no estimate yet exists for the global population . The accuracy of the quote numbers may only be an order of magnitude . </P> <P> It is estimated that the total number of wild mammals in the world is about 130 billion . </P>

What mammal has the highest population on earth