Penguins

The penguins are basically nameless and non-differential creature. Normally playful and wacky in manner, they have appeared in many Muppet productions (sometimes in places where penguins are not commonly seen). In The Muppets' Wizard of Oz, the Muppet penguins are referred to by Scooter as "unisex" or gender-less.

Quotes
Brian Henson: "What my father figured out was if you can't get out, you just either blow something up, or you eat something, or you just throw penguins in the air."

Seen in...

 * The Muppet Show
 * The Muppet Movie
 * The Muppets Go to the Movies
 * The Muppets Take Manhattan
 * A Muppet Family Christmas
 * Plymouth Muppet Traffic Safety Show
 * Muppet*Vision 3-D
 * Muppet Sing Alongs: Billy Bunny's Animal Songs
 * The Muppet Christmas Carol
 * Muppets From Space
 * It's a Very Merry Muppet Christmas Movie
 * Keep Fishin' Music Video
 * Good Morning America
 * The Muppets' Wizard of Oz
 * Statler and Waldorf: From the Balcony