Donald in animation
For more details on this topic, see Donald Duck filmography.
Donald Duck as he first appeared in The Wise Little Hen
According to Leonard Maltin in his introduction to The Chronological Donald - Volume 1, Donald was created by Walt Disney when he heard Clarence Nash doing his "duck" voice while reciting "Mary had a little lamb". Mickey Mouse had lost some of his edge since becoming a role model for children and Disney wanted a character that could portray some of the more negative character traits he could no longer bestow on Mickey.
Donald Duck first...