Both have spines (vertebrates) and skin (underneath the fur or feathers).
No. The only similarity is that they are both animals. Platypuses are mammals: they are monotremes, meaning they are egg-laying mammals. Ducks are birds.
Of course not ...no birds are mammals !!!!!!!!!!!No, they are birds.
birds and mammals both give birth to live young
No, there are no birds that are mammals. These are two completely different classes of the animal kingdom. Birds are class aves, mammals are class Mammalia.
birds, any mammals
No, they are birds.
No. Birds are not mammals.
No. They are birds. Birds and mammals are separate classes of animal.
No. They are birds. Birds and mammals are separate classes of animal.
Raccoons are not birds. Raccoons are mammals.
Mammals differ from birds as birds lay eggs, and mammals give live birth.
No. Woodpeckers are birds and birds are not mammals.