Life cycle of birds

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Across
  1. 3. a part of a tree
  2. 6. oval round object laid by birds
  3. 7. grows on the skin of birds
  4. 8. to give food to
Down
  1. 1. a very young child
  2. 2. used for flying
  3. 4. a bird used to eat
  4. 5. antonym of closed
  5. 7. to move wings up and down