20 facts about baby animals 1. Some animal babies are tiny versions of adults. 2. Baby animals start life in different ways. 3. Some hatch out of eggs and some are born live. 4. Birds, amphibians, fish, and many reptiles do this inside an egg. 5. A baby bird enters the world by hatching out of a hard – shelled egg laid by its mother. 6. Many birds incubate their eggs by sitting on them to keep them warm until they hatch. 7. Emperor and king penguins, which live in Antarctica, warm their eggs by resting them on top of their feet. 8. Many snakes begin life in eggs too, but snake eggs are tough and leathery rather than hard and brittle. 9. A snake called the Indian rock python lays between 50 and 100 eggs at a time. 10. Since snakes are cold blooded, the mother rock python has to twitch her muscles to create heat. 11. During the two months it takes for the eggs to hatch, the mother python stays in one place and dose not even eat. 12. Frogs lay their eggs in jelly – like clumps along the edge of a pond. 13. Mother frogs do not take care of their eggs. 14. When a baby, or tadpole, hatches, it doesn’t look anything like an adult frog. 15. It has a tail, it has no legs or eyes, and it is completely helpless. 16. The tadpole grows legs, its tail begins to shrink, and it looks more and more like its parents. 17. Some baby animals do not hatch from eggs. 18. Mammals differ from other kinds of animals in other ways as well. 19. They are warm blooded, they usually have hair or fur, and their babies are fed with milk that comes from the mother. 20. Kangaroo babies are less than I inch (2.5 centimeters) long when they are born.