Birds of a feather

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Across
  1. 3. meant for pecking
  2. 4. a birds home, made by itself
  3. 7. a manmade home for birds
  4. 8. the name of a bird, as well as a superhero
  5. 9. the object birds are born out of
Down
  1. 1. a lightweight object that you put in your pillow
  2. 2. a zoologist who studies birds (it's in our orginization name!)
  3. 5. needed in order to fly
  4. 6. the noise baby birds make