Mammals:
* Humans
* Dogs
* Cats
* Cows
* Horses
* Whales
* Dolphins
* Bats
* Monkeys
* Kangaroos
Other Animals:
* Some species of sharks
* Some species of fish
* Some species of reptiles (like some snakes and lizards)
Key Characteristics of Viviparous Animals:
* Internal fertilization: The eggs are fertilized inside the female's body.
* Embryo development inside the mother: The embryo develops inside the mother's body, receiving nourishment through a placenta or other structures.
* Live birth: The young are born alive, rather than hatching from eggs.
Note:
There are some animals that are ovoviviparous, meaning they lay eggs, but the eggs hatch inside the mother's body, and the young are born alive. This is considered a middle ground between oviparous and viviparous. Examples include some sharks, snakes, and lizards.