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Across 3. Featherless patch on the body used to cover and keep eggs warm. 5. Turned into ice. 6. To break out of an egg. 9. A loud sound. 12. Move into a warm, comfortable position. 15. To slide the feet along the ground while walking. 16. Does not allow water in. 19. To hold close and tenderly. 20. A place where many birds go to lay their eggs. 21. To turn / to change direction.

Down 1. When penguins slide on their stomachs to move. 2. Makes a sound by blowing air through the lips. 4. A sled used on snow to carry people down a hill or slope. 7. An extremely cold continent at the south pole. 8. Flat body parts used for swimming by animals such as seals and penguins. 10. Hits with a beak. 11. Feet with toes that are connected by skin. 13. A nursery for babies or very young. 14. A soft kind of feather. 17. A closely packed group. 18. To groom with care.