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  1. Mammal - Wikipedia

    A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia (/ məˈmeɪli.ə /). Mammals are characterised by the presence of milk -producing mammary glands for feeding their …

  2. Mammal | Definition, Characteristics, Classification, Examples, & Facts ...

    Dec 22, 2025 · An animal is considered a mammal if it can produce milk. Other features unique to mammals include hair or fur (chemically different from hairlike structures on non-mammals); the …

  3. Mammals – Definition, Examples, Characteristics

    Nov 22, 2023 · Mammals are warm-blooded, hair-bearing vertebrates that produce milk. Mammals represent a diverse and fascinating class of animals, encompassing a wide range of species from …

  4. Mammals - Definition, Types, List, Characteristics, and Pictures

    Dec 31, 2025 · Mammals are a group of complex warm-blooded animals belonging to the class Mammalia. They are recognized by the presence of mammary glands (which produce milk to feed …

  5. Mammal Pictures & Facts - National Geographic

    Mammals are among the most adaptable animals on the planet. They are found on every continent and in every ocean, and range in size from tiny bumblebee bats to enormous blue whales. One reason...

  6. Mammals: Characteristics, Types, Classification, Behaviors, Facts ...

    Mar 16, 2025 · An animal is classified as a mammal if it has three key characteristics: it is warm-blooded, has hair or fur at some point in its life, and the females have mammary glands that produce …

  7. Mammals | Fact file | BBC Earth

    Welcome to the incredibly diverse world of mammals. This group includes humans and all other hairy warm-blooded vertebrates. Their brains are better developed than other types of animals, and they …

  8. About Mammals | American Society of Mammalogists

    Placing mammals in one Class indicates that they are more closely related to one another than any mammal is to an animal in a different Class. Mammals have many physical characteristics that make …

  9. What is a Mammal? | manoa.hawaii.edu/ExploringOurFluidEarth

    The vast majority of mammal species live on land, although some, such as otters, seals, and dolphins, live in freshwater and ocean habitats. Bats are mammals that are capable of flying. Mammals are …

  10. Mammals | San Diego Zoo Animals & Plants

    There are three classes, or main types, of mammals: monotremes, marsupials, and placental mammals. Monotremes are the most primitive mammals, and there are only five species: the platypus and four …