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?
Got it. And what's the difference between a bird and a reptile?
One key difference is that birds have feathers, while reptiles have scales. Birds also have beaks, whereas reptiles have jaws with teeth. Additionally, birds are endothermic (warm-blooded), while most reptiles are ectothermic (cold-blooded).