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• n  a person with confused ideas; incapable of serious thought

• His fancy, his fury, and his fate is to seduce a visiting American showgirl (Florence Henderson), a sunny birdbrain incubated in Wisconsin.
• Next time, think twice before calling someone a "birdbrain.
• DIED THOSE FAMILIAR WITH the cognitive skills of African gray parrot Alex will never again use birdbrain as an insult.

• addle-head
• addlehead
• loon

News & Articles

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• Cockatoos Smart Enough to Open Complicated Locks
  Getting called a birdbrain might not be such an insult after all. A new study published in the journal PLoS One finds that cockatoos, members of the parrot family, can figure out how to break through several complicated locks to get to a treat.        
  July 5, 2013 - ABC News

Quotes

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• Irene Pepperberg in USA Today
  Had I known the multitude of practical obstacles and the anti-birdbrain prejudices I would face over the years, I wonder if I might have had second thoughts about the venture,Pepperberg writes in retrospect.