The horses are minor characters in The Backyardigans.
Unnamed horses are seen in every season of the show, similarly to the Wormans. They are often used to pull carriages and vehicles.
The majority of the horses are mostly brown with white manes and white hooves. "Catch that Train!" includes a white-colored horse.
Unnamed horses have appeared in six episodes of The Backyardigans: "Polka Palace Party", "High Tea", "Catch That Butterfly", "Ranch Hands from Outer Space", "The Masked Retriever", and "Catch that Train!"