Around 6,640 extant species of mammals have been described and divided into 27 orders. [2] The study of mammals is called mammalogy. The largest orders of mammals, by number of …

Oct 6, 2022 · Types of animals that are mammals include warm-blooded vertebrates that have hair or fur and whose babies drink milk. Unlike other animal types like birds and insects, all …

Dec 12, 2025 · Every major habitat has been exploited by mammals that swim, fly, run, burrow, glide, or climb. There are more than 6,800 species of living mammals, arranged in about 125 …

Nov 22, 2023 · Learn about mammals. Discover their characteristics, get examples, and learn about different orders of mammals.

Feb 17, 2025 · What are mammals with examples. Where do they live. Learn about their classification, evolution, lifespan, reproduction, and adaptations with images.

Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair. They feed their young with milk and have a more well-developed …

Apr 23, 2025 · They are divided into three main groups: monotremes (egg-laying mammals), marsupials (pouched mammals), and placentals (mammals with a placenta). The modern …

Apr 29, 2025 · What exactly is it that makes a mammal a mammal, and not a reptile, a bird, or a fish? There are eight main characteristics of mammals, ranging from having hair to four …

Explore facts and photos about mammals found in the United States. Learn about their range, habitat, diet, life history, and more.

What are mammals? Mammals live all across the world. They can be found living in the ground, in trees, and even in the sea. There are many different kinds of mammal, including us humans!