Various Ducks appeared on The Muppet Show. One debuted in Episode 113: Bruce Forsyth of The Muppet Show, while another one was also made for Episode 303: Roy Clark. Ronald Duck was the name given to one of the fowl in Episode 220.
On Sesame Street, a different, more cartoonish duck appeared regularly, beginning in the 1980s. Originally performed by Kevin Clash, the character was recently named Alfred the Duck. Rubber Duckie remains the best known Sesame Street duck, however.
Bear in the Big Blue House features Harry the Duck, Hallie Duck, and Mama Duck.