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Across 3. They are large flightless birds of Africa who lay the largest eggs of any living land animal. 7. Type of wading bird with four different species throughout the Americas. 8. Have a slender segmented body and one pair of wings. 10. The only domesticated species in the family Felidae. 11. Domesticated, odd-toed, hoofed mammal. 13. Freshwater crustaceans resembling small lobsters. 15. They became the dominant terrestrial vertebrates after the Triassic-Jurassic extinction event. 16. Domesticated, ruminant mammals typically kept as livestock. 18. The common species are opportunistic survivors and often live with and near humans. 19. They live almost exclusively in the southern hemisphere.

Down 1. Member of the animal family Bovidae and the tribe Caprini. 2. They are easily recognized by a pair of grasping pincers and a narrow, segmented tail. 4. They communicate through honks, sneezes, and poo. 5. Fastest land animal native to Africa and central Iran. 6. The collective noun for a group of this animal when in flight, is called a skein. 9. They perform many roles for humans, such as hunting, protection, and assisting the police. 12. Sexually immature female is called a pullet. 14. Air-breathing arthropods that have chelicerae with fangs generally able to inject venom. 16. Ectothermic, amniote vertebrate covered in overlapping scales. 17. Known to invade homes for food and shelter.