How many movies have Diana Birkenfield and Jerry Nelson collaborated on?

They have worked on 6 movies together! Their first movie together was The Great Santa Claus Switch (1970) while their highest rated movie together was Christmas Eve on Sesame Street (1978). They have not worked together since The Muppets at Walt Disney World (1990). They are most known for their family films together.

Crew
Producer
Role
Camilla / Ma Bear / Floyd / Robin the Frog (voice)
Crew
Associate Producer
Role
Thog/Zippity/Snivelly (voice)