* Mammals: Humans, dogs, cats, whales, bats, etc.
* Birds: Chickens, eagles, penguins, etc.
* Reptiles: Snakes, lizards, turtles, crocodiles, etc.
* Amphibians: Frogs, toads, salamanders, etc.
* Fish: Sharks, goldfish, tuna, etc.
There are also some exceptions within these groups, like some snakes and lizards who have lost their limbs and their bones over time.
Let me know if you'd like more details on any of these animal groups!