Egg laying time!

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Across
  1. 2. This extinct bird is a large type of flightless bird, closely related to pidgeons
  2. 6. A semiaquatic mammal with what looks like a beaver tail and a duck bill
  3. 8. Large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas, and Australia
  4. 9. A quill-covered monotreme, also sometimes called the spiny anteater
Down
  1. 1. This order of reptiles is characterized by a shell developed mainly from their ribs
  2. 3. This bird has feathers adapted for silent flight, hunts during the night, and can swivel its head almost all the way around
  3. 4. These flightless birds lay the largest eggs of any living land animal
  4. 5. A bird of prey found in North America, also a national bird
  5. 7. This bird is said to bring babies according to European folklore