The main characteristic of the flying mammals is that they are all species of bats. Bats are the only flying mammal. Some of the characteristics of bats are that they fly almost exclusively at night, they can't walk very well, and they have excellent hearing.
The mammary glands, a defining characteristic of mammals.
Birds and mammals are air breathers. Lampreys are not.
Mammals have a body covering of hair or fur.
It is rephrased as mammals are homeothermic animals .
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Dolphins are warm blooded like other mammals.
a Shared ancestral characteristic a shared primitive characteristic
Having hair is a characteristic of all "mammals."
As with all mammals, the echidna feeds its young on mothers' milk.
Mammal.All mammals feed their young on mothers' milk. This is the defining characteristic of a mammal, and it is a characteristic not shared with any other vertebrate.Mammals include placental mammals, marsupials and monotremes (egg-laying mammals).
No, all mammals have some form of hair or fur on their bodies at some point in their development. Hair is a defining characteristic of mammals and plays important roles in insulation, protection, and sensation.
Mammary glands (udders, breasts, teats, etc)