• A warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, females that secrete milk for the nourishment of the young, and (typically) the birth of live young.

  哺乳动物

  Example sentencesExamples

  • The domes will contain different freshwater environments containing fish and aquatic mammals.
  • Unlike mammals, chicks do not feed on milk formula as their stomachs cannot digest it.
  • They inhabited a world that was dominated by a different kind of animal - the mammal.
  • It provides the growing young with everything it wants, and only mammals produce milk.
  • This bulky animal is one of the most dangerous mammals to be found anywhere.
  • The lack of suitable nest sites has also resulted in increased predation by corvids and mammals on the eggs and chicks.
  • Some mammals can distinguish between and respond to the alarm calls of other mammal and bird species.
  • Certainly, a lot of changes would have to occur for a land mammal to live in the sea.
  • The decaying wood also becomes home to a range of insects and small mammals.
  • West Nile Virus is found mainly in birds, though it is also found in horses and other mammals.
  • Nothing is more remarkable than the effects of habit in herbivorous mammals.
  • The teeth and their pattern of wear are unlike that seen in any modern mammal so what this animal ate is something of a mystery.
  • Dolphins are mammals and as such are warm-blooded and bear live young, which they suckle.
  • The island refuges of some species are also under threat from imported mammals such as rats and hedgehogs.
  • Recently, the rat became the third mammal for which the complete genome was sequenced.
  • Their prey consists mainly of birds and small mammals such as rats and agoutis.
  • The sloths and armadillos are rather odd mammals characteristic of South America.
  • The domestic animal is the first mammal known to die of the disease in Europe.
  • The male feeds the female while she incubates, catching small mammals and birds and bringing them back to the nest.
  • Animal pathologists found the mammals had suffered internal bleeding in the ears and the brain.

The first small mammals evolved from reptiles about 200 million years ago, and the group diversified rapidly after the extinction of the dinosaurs to become the dominant form of land animal, with around 4,000 living species. Mammals belong to the class Mammalia, which contains the subclass Prototheria (monotremes) and the infraclasses Metatheria (marsupials) and Eutheria (placental mammals such as rodents, cats, whales, bats, and humans)