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 the following:
There isn't a mammal-bird.
No. Whether it is tropical or not, no bird is a mammal.
it is a bird. Kiwi isn't a mammal
This bird is not a mammal
There is no such thing. No bird is or ever was a mammal.
A bird is not a mammal.