Question

ASAP! Please?

Since monotremes can lay eggs, why aren't they classified as birds?
-- Explanation NOT multiple choice question --

Answer 1

Monotremes, like the Duck-billed Platypus, are not referred to as birds because they lactate, which is a function only possible with mammals, not avians.

Answer 2

Answer: They aren't classified as birds because monotremes are mammals, unlike birds. They are referred to as mammals because they have mammary glands responsible for manufacturing and producing milk. Birds cannot do this.