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Most are related to reducing weight for flight:

  • Small brain with 'hard-wired' reflex-like responses
  • Hollow bones
  • Lungs are 'flow-through'
  • Eyes do not have muscles to move them in the sockets
  • Feathers
  • Fused skeleton, especially the rigid backbone
  • Dorsal musculature reduced or moved ventrally to lower the center of gravity
  • Absence of teeth
  • No external ear
  • Flexible neck
  • Reduced tail, reduced digits in the wings
  • Keel (breast-bone) provides strong anchor for the flight muscles
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13y ago
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14y ago

there wings are really strong like the hawk and egal

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10y ago

Feathers, air sacs, reduction of organs, and a lightweight skeleton. All of these adaptations are for flight.

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