The conversation between human and AI assistant.
Is a bird an animal?  I keep having this argument with someone who says a bird is not an animal, it's a bird.  It doesn't meet the definition of a mammal, so is it really in a class by itself?
But why do some people think birds are not animals? Is it because they're not mammals?
That may be a possibility. Some people might not realize that animals include more than just mammals. Birds are vertebrates, just like mammals and reptiles, and are part of the animal kingdom.