For half a century, Caroll Spinney was the alter ego to both Big Bird and Oscar the Grouch on Sesame Street. His Big Bird had a childlike innocence, sometimes goofy, sometimes subdued, outgoing or shy, like most children a creature of habit and mood. His themes were simple: that it was good to speak up, O.K. to make a mistake, all right to be sad sometimes. His masterful work brought him acclaim and honors including six Daytime Emmys, two Grammys, a Library of Congress Living Legend Award in 2000 and a Lifetime Achievement Award of the National Academy of Television Arts and Sciences in 2006.