Order : Rodentia
Did you know that roughly half of all mammals (2000+) species are rodents? What is also very interesting is that rodents are the only placental order except for bats to reach Australia without human introduction... The members of the order Rodentia differ in size and shape. The African Pygmy Mouse is as small as 6 cms in length and weighs only 7 grams. The Capybara is the largest rodent and can weigh up to 45 kg (100 pounds). Rodents can be found anywhere in the world except Antarctica.
Image: Apodemus sylvaticus by Pethan October 9, 2005 The Netherlands, licensed under Attribution 2.5