Across
- 2. spines of porcupine
- 5. a flying mammal
- 9. a substance that carries oxygen to all parts of human body
- 11. waxy and water-resistant outer covering of ants
- 12. a flightless bird
Down
- 1. breathing organ in dolphin
- 3. curved claws of eagles
- 4. term used for animals with sharp front teeth
- 6. long and thin tube-like mouth of butterflies
- 7. the back limbs
- 8. animals that can fly
- 10. body covering of crocodile