From Muppet Wiki

Mommy Dodo is Big Bird's foster mother in Follow That Bird. The bubbly and bubble-minded Mommy and spouse Daddy Dodo were selected as ideal parents by Miss Finch. She was cheerful and optimistic but very ditzy and did not provide Big Bird with the love and affection he needed. When Big Bird was visibly upset and cried that he wished to go home, Mommy Dodo merely told him that he was already home and laughed it off.