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Ivory-billed Woodpecker vs. Pileated Woodpecker: Key Differences

          Ivory-billed Woodpecker                    Pileated Woodpecker
                                                           Male Features
 
 
                                                 Female Features
 
 

Key Differences:

  Ivory-billed Woodpecker Pileated Woodpecker
Rear View White secondaries form white shield on perched bird Black flight feathers form black back on perched bird
White lateral neck stripes Extend downwards, forming a pair of white suspenders on a black back Drops under the wing to join the white wing lining
When flying away Shows white on trailing edge of wing Shows black upper wing
Flight behavior Ivory-billed flies in a more or less level manner Pileated undulates up and down as it flies

For further details view the Ivory-billed Woodpecker and Pileated Woodpecker profiles. 

 

Credits to www.audubon.org