Flying High

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Across
  1. 3. Birds ___ their wings to fly higher
  2. 4. To move smoothly and easily through the air
  3. 7. To extend or spread out something, like a body part
  4. 9. A change in a living thing to better suit its environment
  5. 10. An important or noticeable part of something
  6. 11. How heavy something is
  7. 12. Existing or happening a long time ago in history
Down
  1. 1. The parts of a bird or insect used for flying
  2. 2. Happening or existing at a time after others
  3. 3. The act of flying through the air
  4. 5. The ability or skill to do something well
  5. 6. A light, soft part of birds' bodies that covers their skin
  6. 7. To fly high in the sky with little effort
  7. 8. To develop or change gradually over time