<Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (December 2014) </Td> </Tr> <Ul> <Li> Mammals by population <Ul> <Li> Artiodactyla (even - toed ungulates) </Li> <Li> Carnivora (carnivora) </Li> <Li> Cetacea (cetaceans) </Li> <Li> Chiropractor (bats) </Li> <Li> Perissodactyla (odd - toed ungulates) </Li> <Li> Primates </Li> </Ul> </Li> </Ul> <Li> Mammals by population <Ul> <Li> Artiodactyla (even - toed ungulates) </Li> <Li> Carnivora (carnivora) </Li> <Li> Cetacea (cetaceans) </Li> <Li> Chiropractor (bats) </Li> <Li> Perissodactyla (odd - toed ungulates) </Li> <Li> Primates </Li> </Ul> </Li> <Ul> <Li> Artiodactyla (even - toed ungulates) </Li> <Li> Carnivora (carnivora) </Li> <Li> Cetacea (cetaceans) </Li> <Li> Chiropractor (bats) </Li> <Li> Perissodactyla (odd - toed ungulates) </Li> <Li> Primates </Li> </Ul>

What is the most numerous creature on earth