Across
- 6. shape of birds that fly
- 9. another bird that can not fly
- 11. most aquatic animals breathe through this
- 12. animals without a backbone
- 16. bird that can not fly
- 17. example of an extinct flightless bird
- 18. feed on dead matter
- 19. animal that eats only plants
Down
- 1. animals with a backbone
- 2. animals which give birth to babies
- 3. animals that eat other animals
- 4. animals that have thick layer of hair just below their skin
- 5. mammals breathe through this
- 7. animals which live in water as well as land
- 8. animals that no longer exist
- 10. live on/inside other living things
- 13. animals on verge of extinction
- 14. animals that eat both plants and animals
- 15. animals which live mostly on trees