The Wubbulous World of Dr. Seuss (1996)

S1E19 The Birthday Moose

Thidwick can barely contain his excitement—it’s his birthday, and as always, the Birthday Bird is supposed to fly him and all the other birthday kids to Katroo for an epic celebration. But when news arrives that the Birthday Bird won’t be coming this year, Thidwick takes matters into his own hands. He decides to disguise himself as the Birthday Bird and lead the group to Katroo himself!