A mammal is an animal that breathes air, feeds milk to its babies, and has fur for at least part of its life. Most mammals give birth to live babies. Only a few lay eggs. Some mammals, like cows and goats, are herbivores and eat only grass and other plants. Others, like cats, are carnivores and eat only meat. Some mammals, like whales, live only in the ocean, and others, like squirrels and bobcats, live only on land. Some mammals, like beavers, spend time both on land and in water. Did you know that you are a mammal? A pronunciation guide of scientific terms is included.