Animals

2. An animal that naturally hunts, kills, and feeds on other animals
6. An organism that gets its energy and nutrients strictly by eating other animals
7. The natural physical environment in which an animal lives and survives
10. Semi-aquatic egg-laying mammal native to eastern Australia with a duck-like bill
12. Spiny Australian monotreme with a long snout that feeds on ants and termites
13. An animal without a backbone, such as an insect, jellyfish, or spider
14. Tree-dwelling Australian marsupial that feeds almost exclusively on eucalyptus leaves
15. Native Australian wild canine found across the mainland
17. A rare mammal that lays eggs instead of giving birth to live young
19. A physical trait or behaviour that helps a species survive in its ecosystem
20. An animal that possesses an internal skeleton and a backbone

1. The permanent disappearance of an entire species from Earth
3. Natural coloration or patterns that help an animal blend into its surroundings
4. An animal like a kangaroo or koala whose young develop inside a maternal pouch
5. A deep state of dormancy some animals enter to survive harsh winter conditions
8. Cold-blooded vertebrate that typically starts life in water with gills and moves to land with lungs
9. Seasonal, long-distance movement of animals from one region to another
11. An animal that eats only plant matter such as grasses, leaves, and bark
16. A creature that naturally feeds on both plant and animal matter
18. Describing an animal that sleeps during the day and becomes active at night