Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young. Most mammals also possess sweat glands and specialised teeth, and the largest group of mammals, the placentals, have a placenta which feeds the offspring during gestation. The mammalian brain, with its characteristic neocortex, regulates endothermic and circulatory systems, the latter featuring red blood cells lacking nuclei and a large four-chambered heart maintaining the very high metabolism rate they have. Mammals range in size from the 30–40 mm Bumblebee Bat to the 33-meter Blue Whale. Man is the commonest mammal, who dominates the world.
Agouti
Anteaters
Antelopes
Armadillos
Aardvarks
Badgers
Bats
Bears
Beavers
Bobcats
Buffaloes
Bison
Bush Baby
Bactrian Camels
Cats
Cheetahs
Capybara
Chimpanzee
Deers
Dog
Dolphins
Duiker
Echidnas
Elephants
Elk
Ferret
Foxes
Gaur or seladang
Giant Armadillo
Gazelle
Gerbils
Gerenuk
Giraffes
Goats
Golden Moles
Gibbons
Guinea Pigs
Hamsters
Hedgehogs
Hippopotamus
Horses
Hyenas
Impala
Jackals
Jaguar
Leopards
Lions
Llamas
Mandrill
Monkey
Marine
Marsupials
Meerkat
Mice
Moles and Desmans
Moose
Musk Ox
Otters
Red Pandas
Pigs
Polar Bear
Pudu
Peccary
Ptarmigan
Platypus
Primates
Pronghorn
Killer Whale
Rabbits
Reindeer
Raccoons
Rats
Rhinoceros
Rodents
Sheep
Shrews
Skunks
Sloths
Slugs
Snails
Squid
Solenodon
Squirrels
Takin
Tapirs
Tigers
Tortoise
Warthog
Whales
Tasmanian Wolves
Yaks
Zebra
