Caroll Spinney: Official site with book information, list of characters he's played and samples of his paintings.
NPR : A Life Inside Big Bird: At eight-foot-two, he's easily the biggest star in children's television. But it's a small world inside the costume of Sesame Street's Big Bird. Caroll Spinney, who also performs Oscar the Grouch, discusses the evolution of Big Bird with NPR's Bob Edwards. See a video clip of Spinney's characters.
The Internet Movie Database (IMDb): Carroll Spinney: Credits and trivia.
USA Today: The bird man of 'Sesame Street': Article focusing on Spinney's philosphical book.