Mammal: Learn about the characteristics

Learn about the characteristics, types, and examples of mammals, the warm-blooded vertebrates that have hair or fur and produce milk. Find out the differences between monotremes, marsupials, and placental mammals, and see photos of various mammals. Learn about mammals, a group of complex warm-blooded animals with mammary glands, hair, and three middle ear bones. Find out their diversity, classification, organ systems, and adaptations. Mammals are one of the most diverse and fascinating groups of animals on Earth. From the tiny bumblebee bat to the gigantic blue whale, mammals have evolved to occupy nearly every ecosystem on the planet. They are warm-blooded vertebrates characterized by their ability to produce milk, grow hair or fur, and exhibit high levels of intelligence compared to other animal classes. Learn about the diverse and fascinating world of mammals, from humans and other primates to big cats and dolphins. Explore their characteristics, habitats, threats and conservation status with photos and facts.