Mammals are found in nearly every environment on Earth, from tropical rainforests and high mountains to rivers and oceans. But many mammal species are declining because of habitat loss, hunting, illegal wildlife trade, fishing, pollution and other threats. Some are...
What Are Mammals? Mammals are a group of animals known for a few defining traits. They have hair or fur at some stage of life, are warm-blooded, and females produce milk to feed their young. Most mammals give birth to live young, although a small group, such as the...