Is a bird a mammal?
No, a bird is not a mammal because it lays eggs, it metabolizes
nutrients differently, they have a different digestive tract, and
they have lighter bones.
Actually you should ignore the fact that a bird lays eggs. A
platypus lays eggs and is a mammal, however, a bird is not a mammal
because a mammal feeds its young milk.
No, a bird is not a mammal. Although both birds and mammals are
warm-blooded vertebrates, mammals are in the class Mammalia and
birds are in the class Aves. Differences between the two include
- Mammals have an outer covering of skin, fur or hair, while
birds have a covering of feathers.
- With the exception of the two monotremes, the platypus and
echidna, mammals gve birth to live young, whereas all birds lay
- All mammals (including the monotremes) nurture their young on
- All modern birds, even the flightless ones, have wings, whereas
the only truly flighted mammal is the bat.