Across
3. Animals that eat both plants and flesh of other animals
4. Animals that live in water
5. Animals sit on their eggs to keep them warm
12. Animals that live on trees
13. Animals that eat flesh of other animals
14. Animals that eat flesh of dead animals
DOWN
1. The hard outer covering in insects
2. Shedding the old skin by animals
4. Animals that live both on land and in water
5. Animals without a backbone
6. The reduced activity of some animals in summer
7. Animals with a backbone
8. Animals that live on land
9. Animals that eat plants
10. The reduced activity of some animals in winter
11. Animals that are very few in numbers and may soon no longer exist
