Across
- 3. These kinds of animals don't lay eggs
- 4. Most birds can do this
- 7. These types of animals need to have wet skin
- 10. -----is the opposite of safe
- 11. -----help animals that live under water to breathe
Down
- 1. -----helps fish swim
- 2. -----is a mammal
- 4. -----have scales
- 5. -----keeps birds warm
- 6. -----also helps fish swim
- 8. Birds have two of these
- 9. -----is an amphibian