The Jim Henson Productions logo at the end of the credits features a pterodactyl that does something different from episode to episode (from a small assortment of 3 things, not something unique each time).

Although the credits list actors/puppeteers for the characters individually in the credits, the Howard Handupme newscaster character, despite being in multiple episodes, is never listed separately and credited directly (presumably his portrayer(s) is/are listed under the "other actors" credits).