A mammal is warm-blooded, which means that its body temperature stays the same, even if it's cold outside. A mammal does not have to have any limbs, but it will never have more than four limbs. A mammal breathes with its lungs. This means it takes in oxygen and expels carbon dioxide. The teeth are made for grinding and or shearing food.
Some mammals are carnivorous , which means they have to eat meat.
Some mammals are herbivorous , which means they only eat plants. Other mammals are omnivorous , which means they eat plants and meat. Mammals roam all over the world and have a range of different habitats. Mammals can be seen thoughout the year, but some mammals, such as bears, hibernate for the winter. There are many Animal Resources in print and on the World Wide Web that will give you more information about mammals .