birds have hollow bones and wings;
reptiles don't.
A reptile's skeleton contains bone.
Physically reptile eggs tend to be much softer. Much more like a plastic covering than a bird's egg which tends to be hard and brittle.
A red robin is not a reptile; it is a bird.
A budgerigar is a bird.
No. A hen is a bird.
No, an ostrich is a member a of the bird family. How could it be a reptile?
mammal
a sparrow is neither a reptile or a mammal. It is a bird.
No a Robin is not a Reptile..... It is a Bird. But is also Batman's sidekick
it is a reptile they aren't mammals.
mammal, reptile, fish, bird, invertebrate, vertebrate, mollusk, insect, arachnid
mammal is elephant, bird is ostrich, amphibian is frog, and reptile is nile crocodile