There are three species of mammals that lay eggs: the Platypus and two species of echidna, the long-beaked echidna of New Guinea and the short-beaked echidna of Australia. These mammals, known as monotremes, lay eggs with leathery shells.
Placental mammals and marsupials do not lay eggs. Only monotremes are egg-laying mammals, and these include the platypus and the echidna. These mammals lay soft-shelled, leathery eggs.
Animal's eggs are the same to ostrich eggs because they are all eggs but the only thing is that the ostrich eggs are larger.
Monotremes (egg-laying mammals) lay rubbery-shelled eggs, whilst birds lay eggs with hard shells. Monotreme eggs have larger yolks than birds' eggs.
The main difference is that a hornbill is a bird, while a rabbit is a mammal.
mammal
Thenoticeabledifference is that bird erythrocytes have organelles and a nuclei, which most mammals erythrocytes don't have.
birds lay eggs, while mammels are born alive.
Do you mean cygnet? If so this is a baby swan. So it is a bird not a mammal.
they have diff. no. of chambered heart
a bird has feathes and a beak and a mammal gives milk to its birth
One is mammal, one is a bird, birds lay eggs.
There isn't a mammal-bird.
No. Whether it is tropical or not, no bird is a mammal.
No. A budgerigar (budgie) or parakeet is a bird, not a mammal.
There is no such thing. No bird is or ever was a mammal.