Instances when characters dress up as animals (including if they're animals to begin with).

Picture	Impersonator and Animal	Production	Notes
	Akshar Kumar as a rabbit	Galli Galli Sim Sim	Akshar Kumar, Bollywood movie star from India, in one of his many movie roles.
	Akshar Kumar as a tiger	Galli Galli Sim Sim	Akshar Kumar, Bollywood movie star from India, in one of his many movie roles.
	Alan as a fly	Sesame Street Episode 4273	Alan posses as a fly to attract a frog for a princess to kiss.
	Alice the Actress as a rabbit	Sesame Street Episode 2619	Alice the Actress appears on Hoots the Owl's talk show in her "Flopsy" costume from her play, The Three Sisters.
	Baby Bear as a monkey	Sesame Street episode 3853	Baby Bear helps Elmo bring the zoo to Maria.
	Baby Bear, Telly Monster and Elmo as cats	Sesame Street episode 3948	The three portray cats to keep Little Murray Sparkles company.
	Baby Bear as a Honker	Sesame Street episode 4028	Elmo and Baby Bear cavort as species indigenous to Sesame Street.
	Baby Bear and Telly Monster as dogs	Sesame Street episode 4137	Baby Bear and Telly dress as dogs to try and lure the word "dog" back into their book.
	A banana as a tiger	Sesame Street	A banana being asked to play the part of a tiger in a movie agency sketch.
	Barkley as a cow	Sesame Street Episode 2367	As an experiment, Dr. Nobel Price places horns and a cowbell on Barkley, to see if he'll moo.
	Bats as cows	Sesame Street 4-D Movie Magic	The Count's bats play cows in his movie The Counting Kid Counts Again.
	Bert as a pigeon and Ernie as a duckie	Sesame Place The Count's Halloween Spooktacular	The park's Bert and Ernie walk-around characters dress-up as their favorite birds for Halloween.
	Bert as a caterpillar	Sesame Street Butterfly Pageant	Bert dresses up as a caterpillar for the pageant.
	Bert as a deer	Sesamstrasse Die Grosse Sesamstrassen-Musikshow segment (EKA: Folge 2472)	As part of Finchen's song about the woods, Ernie dresses Bert up like a deer.
	Bert as a rooster	Sesamstrasse Die Grosse Sesamstrassen-Musikshow segment (EKA: Folge 2475)	As part of Lena and the chickens' song about farm animals, Ernie dresses Bert up like a rooster.
	Bert as a shark	Sesamstrasse Die Grosse Sesamstrassen-Musikshow segment (EKA: Folge 2460)	Bert plays the shark in Samson's song about underwater.
	Bert as a swan	Sesamstrasse Die Grosse Sesamstrassen-Musikshow segment	In Pferd's song about dancing, Ernie dresses Bert up as a swan.
	Big Bird as "Big Fish"	Sesame Street episode 3161	Wolfgang the Seal chases fish explorer Wanda Cousteau all over the Street. Big Bird pretends to be Wanda's huge friend, Big Fish, to scare Wolfgang into leaving Wanda alone.
	Big Mean Carl as "Carl the Big Mean Bunny"	Muppets Tonight "Stand By Me"	Carl dresses as a bunny during the game show "Swift Wits" and as part of a violin act in episode 106. In "Stand By Me", he dons the same bunny ears to attract fellow rabbits so he can eat them.
	Big Mean Carl as a frog	Muppets Tonight! Episode 211	In a scene from Four Weddings and a Frog, Carl appears in a long line of frogs waiting to meet Andie, posing as one by going "Ribbit. Ribbit." One frog sees through his attempt and gets eaten.
	Bob as a bee	The Perfect Thing	Placido Flamingo sings about the perfect thing for bees to do.
	Bob as a chicken	Episode 4063	Bob dances the "Clucky Clucky" to help Elmo fall asleep.
	Bunsen, Beaker and penguins as bunnies	Muppetisms	Bunsen and Beaker test a theory about bunnies.
	Buster the Horse as a zebra	Learning About Letters	Buster in stripes to demonstrate the letter Z.
	a cat as a dog	The Jim Henson Hour episode 104	A stunt-cat dresses as a dog in a behind-the-scenes feature for Dog City, failing to prove that the "thing" between cats and dogs is just a myth.
	The Cat in the Hat and Little Cats A, B, and C as birds	The Wubbulous World of Dr. Seuss "The Cat in the Hat's First-First Day"	The Cat in the Hat and the Little Cats dress as birds to cheer Terrence McBird as he tries to fly.
	a chicken as the Dormouse	The Muppet Show episode 506	An ordinary chicken with buckteeth, ears, and whisker playing the Alice in Wonderland Dormouse.
	Cookie Monster as the Cookie Bunny	Sesame Street	Cookie Monster wearing long blue ears, small nose, whiskers, and buck teeth, until they fall out of his mouth as he "hides" his colorful cookies.
	Cookie Monster as the Cheshire Cat	Abby in Wonderland	Cookie Monster appears as the Cheshire Cookie Cat in the 2008 direct-to-DVD production.
	Count von Count as the Caterpillar	Abby in Wonderland	The Count plays the character as "The Counterpillar" (because he loves to count things).
	Croquette as a unicorn	Fraggle Rock "We Love You, Wembley" (French version)	Doc straps a horn on Croquette, to pose for Madame Pontaven's crest.
	a dancer as a lion	The Fantastic Miss Piggy Show	During the "Calendar Song," a chorus dancer appears as a lion, to demonstrate March. When he turns around, however, on his back is a Muppet-style lamb, who opens his mouth and bleats.
	Dinosaur as Moola the Cash Cow	Dinosaurs "Variations on a Theme Park"	A dinosaur teen dresses up as a cheerful cartoon cow.
	Doc as Sprocket	Fraggle Rock "I Want to Be You"	Doc goes as his own dog to the society costume ball.
	Earl Sinclair as Georgie	Dinosaurs "George Must Die"	Earl dresses up as Georgie the hippo.
	Doc Hopper as a frog	The Muppet Movie	Doc Hopper portrays a frog in a commercial for Doc Hopper's French Fried Frog Legs
	Dr. Teeth as the Cheshire Cat	The Muppet Show episode 506	Another Alice in Wonderland portrayal, the regular Dr. Teeth head on a cat body and with ears.
	The Elephant as a penguin	Sesame Street Episode 3145	An elephant is seen dressed as a penguin during the penguin party at the Furry Arms.
	Elmo as a lion	Sesame Street episode 3853	Elmo dresses as a lion to bring the zoo to Maria.
	Elmo as a puppy	Sesame Street episode 3952	Elmo dresses as a puppy in a song.
	Elmo as a Dinger	Sesame Street episode 4028	Elmo and Baby Bear cavort as species indigenous to Sesame Street.
	Elmo as a "chicken-kitten-cow-bunny"	Sesame Street episode 4032	Elmo dresses as every animal he can think of, rolled into one, to get a vet appointment with Gina and declare his love for her.
	Elmo as a cow	Sesame Street	Elmo plays a silly cow who quacks in the song "Baby, Say It Loud."
	Elmo as a sheep	Sesame Street	Following a Count sketch where a delivery man dresses as a sheep, Elmo appears in a short tag, dressed as a sheep himself.
	Elmo as a wolf	Sesame Street episode 4095	Elmo and Zoe dress up as wolves for their Big Bad Wolf auditions.
	Elmo as the White Rabbit	Abby in Wonderland	Elmo appears as the "Red" Rabbit in the 2008 direct-to-DVD production.
	Elmo as a butterfly	Sesame Street Episode 4268	Elmo pretends to be a butterfly to make friends with one.
	Eric the Parrot as a penguin	The Muppet Show episode 507	When Eric the Parrot disguises himself as a penguin, he appears as any other Muppet penguin. However, he is actually wearing a penguin costume, under which he cannot wear his parrot suit for fear of wrinkling it.
	Ernie as a sheep	"Journey to Ernie" Season 35	Ernie poses as Little Bo Peep's sheep to evade Big Bird.
	Fat Blue Delivery Man as a sheep	Sesame Street	When the sheep go on strike, The Count has a delivery man dress as a sheep, so he can count him and go to sleep.
	Fay Ray as a frog	Sesame Street	Fay dresses up as a frog or maybe Kermit the Dog.
	Fay Ray as a polka-dotted black insect	Sesame Street	Fay dresses up as a polka-dotted black insect.
	Fay Ray as a moose	Sesame Street	Fay dresses up as a moose, yak, or maybe a deer.
	Finchen as a rooster	Sesamstrasse Folge 2398	The gang impersonates the Musicians of Bremen.
	Floyd Pepper as the Caterpillar	The Muppet Show episode 506	Another Alice in Wonderland animal.
	Fluffinella as a French poodle	Fraggle Rock "Red's Blue Dragon"	Though not shown onscreen, Fluffinella attends Ms. Ardath's masquerade party as a French poodle.
	Fozzie Bear as a lion	The Muppets Go to the Movies	As the Cowardly Lion, from the Wizard of Oz sketch.
	Fozzie Bear as a lion	The Muppets' Wizard of Oz	As the Cowardly Lion.
	Frackles disguised as cute, furry animals	The Muppet Show episode 524	Three Frackle spies pose as animals to infiltrate Roger Moore's closing number, "Talk to the Animals".
	Gonzo as a bat	Muppets Tonight episode 108	Gonzo is costumed appropriately for a role in his own musical, "Bats."
	Gordon as a wolf	Sesame Street episode 4095	Gordon acts as a temporary replacement for the Big Bad Wolf.
	Grover as an elephant	Sesame Street	In a lecture on noses, Grover demonstrates with an elephant's trunk.
	Grover as a mouse	A Muppet Family Christmas	Grover plays the unstirring mouse in The Night Before Christmas pageant.
	Grover as a peacock	The Street We Live On	Grover wears a peacock feather, possibly to match Ming.
	Grover as a puffin	Sesame Street episode 4109	Grover dresses as a puffin in a Global Grover segment about Iceland.
	Grover as a crow	Sesame Street	In a Global Grover segment, Grover shows how well a Polish scarecrow works by dressing as a crow and being scared by it.
	Harvey Korman as a chicken	The Muppet Show episode 110	Kermit puts Harvey in a white chicken suit.
	Herry as a butterfly	Sesame Street Butterfly Pageant	Herry dresses up as a butterfly for the pageant, wearing orange Monarch butterfly wings.
	Herry Monster as a fish	Sesame Street Food Pageant	Herry plays a fish in a pageant about healthy food (though his mother made his costume too small).
	Hudson as a pig	The Muppet Show: Sex and Violence	The astronaut poses as "Hudson," a pig butler.
	Jack Black as a chicken	Sesame Street Episode 4173	Jack Black dons an elaborate chicken disguise to fool Elmo while explaining the word "disguise."
	Jason Alexander as a bat	Muppets Tonight episode 108	Jason is costumed appropriately for a role in his own musical, "Bats."
	Jon Voight as a brown turkey	The Muppet Show Live	Voight performs with the chickens.
	Kermit as a rabbit	Sesame Street News Flash sketch	Reporting on rainy day activities, Mona shows how to pretend and makes Kermit pretend to be a rabbit.
	Kermit as a cow	Sesame Street Season 15	Kermit being switched to a cow after he and Gladys switch roles in a sketch in Season 15.
	Kermit as Frogo the Dragon	Muppets Tonight episode 207	Kermit as the dragon in Dennis Quaid's screen test of Dragonheart.
	Kermit as Frogzilla	Muppets Tonight episode 203	Kermit as the reptilian monster in a sketch The Hardy Pig Boys.
	Kevin Kline, Telly Monster and Colambo as chickens	Sesame Street episode 3129	Nick Chicken (Kline), Telly and Colambo disguise themselves as chickens to find find a mysterious chicken thief.
	Kids as zoo animals	Sesame Street episode 3853	Devon dresses as a giraffe, Sara as an elephant and Devon's rabbit as a leopard.
	Leela as a tyrannosaurus rex	Sesame Street Episode 4313	Leela dresses up in a T-rex costume for a Letter of the Day Show, claiming to love the animal (and also because she wished to be on the show).
	"Margaret" as a chicken	The Muppets Take Manhattan	Gonzo's boat driver at the aquacade, in the same chicken suit from The Muppet Show.
	Maria as a queen bee	Fiesta!	Maria plays the queen bee to officiate at the fiesta carnival
	Monty as a penguin	Sesame Street episode 3091	Monty dresses as a penguin for his new penguin school.
	Natalie Portman and Elmo as elephants	Sesame Street	Natalie and Elmo play "The Princess and the Elephants" with a real Elephant.
	Oscar the Grouch as the Cat	Elmo's Musical Adventure: Peter and the Wolf	Oscar plays the role of the Peter and the Wolf cat.
	Oscar the Grouch as a bug	Sesame Street Episode 4175	Oscar and Slimey dress as bugs to make Slimey's new pet bug feel welcome.
	Pferd as a donkey	Sesamstrasse Folge 2398	The gang impersonates the Musicians of Bremen.
	Red Fraggle as a flying fish	Fraggle Rock Episode 103: Let the Water Run and Episode 303: Boober and the Glob	Red dresses as a flying fish to dive into the pool.
	Rosita as a bear	Sesame Street episode 3853	Rosita helps Elmo bring the zoo to Maria.
	Rosita and Zoe as pigs	Sesame Street Episode 4004	Rosita and Zoe pretend to be pigs after wanting to be wolves to play Little Red Riding Hood.
	Sally Hagen as a bee	Aliens in the Family	Sally wears a bee costume to teach Bobut about the letter B.
	Samson as a dog	Sesamstrasse Folge 2398	The gang impersonates the Musicians of Bremen.
	Scred as a bee	Saturday Night Live	Scred attired as Aunt Bee, for a Killer Bees sketch.
	Shirley and Nat Muskrat as a horse	Emmet Otter's Jug-band Christmas	Shirley and Nat perform in a horse costume, which they can't seem to connect, at the talent contest.
	Slimey the Worm as a bug	Sesame Street Episode 4175	Oscar and Slimey dress as bugs to make Slimey's new pet bug feel welcome.
	Mr. Snuffleupagus as a sheep	Sesame Street Episode 2412	Snuffy dresses as a sheep for Meryl Sheep's production of "Little Bo Peep".
	Mr. Snuffleupagus as a horse	Elmo's World: Horses	Snuffy appears at the end of Elmo's quiz, dressed as a horse in his cave.
	Snuffy as a dinosaur	Sesame Street Episode 4152	To assuage Elmo's grief at the dinosaurs' extinction, Snuffy dresses up so that Elmo may have a pet dinosaur.
	Sprocket as a horse	Fraggle Rock "All Work and All Play"	Sprocket decides he wants to be a horse. Doc outfits him with a saddle and cellophane-attached horse shoes.
	Sprocket as a doberman pinscher	Fraggle Rock "Red's Blue Dragon"	Sprocket does a vocal impression of a doberman, snarling at Doc, considering costume party ideas.
	Sprocket as an elephant	Fraggle Rock "Red's Blue Dragon"	Sprocket considers an elephant costume for Ms. Ardath's masquerade party.
	Sprocket as a french poodle	Fraggle Rock "Red's Blue Dragon"	Sprocket ultimately goes to the costume ball as a yappy French poodle. (Fluffinella goes with the same costume.)
	Sprocket as a cat	Fraggle Rock "Boober Gorg"	Sprocket pretending to be a cat, to comfort Ned in Fluffinella's absence.
	Stinky the Skunk as an elephant	The Animal Show "Elephant & Hunting Dog"	Stinky dressed up as an elephant to keep himself cool by using the big ears to fan himself and trunk to suck up water through a pail.
	Suey as a bird and lamb	Sesame Street Episode 3525	In an effort to make people like her, Suey the Pig dresses like a bird (like Big Bird) and a lamb (like Lamb Chop), but learns people will like her for who she is.
	The Swedish Chef as a pig	Muppet Treasure Island	When the Chef appears in a pig's nose as cook for the pig natives, a talking vegetable quips, "How else were we going to get him into this movie?"
	The Swedish Chef as the Easter Bunny	Donna's Day	The chef in rabbit ears.
	Telly Monster as a duck	Sesame Street	Telly plays a silly, mooing duck in the song "Baby, Say It Loud."
	Telly Monster as an elephant	Sesame Street	In a sketch about the power of the imagination, Telly imagines he's an elephant.
	Telly Monster as a goat	Sesame Street	In the same sketch, Telly imagines he's a goat.
	Telly Monster as a lion	Sesame Street	In the same sketch, Telly imagines he's a lion.
	Telly Monster as a lion	Sesame Street Episode 3952	Telly Monster dresses up as a lion in a song.
	Telly Monster as the Duck	Elmo's Musical Adventure: Peter and the Wolf	Telly plays the role of the duck, another Peter and the Wolf portrayal.
	Telly Monster as a penguin	Sesame Street Episode 3145	Telly dresses as a penguin, as he was invited to the Penguin Party at the Furry Arms.
	Thidwick the Big-Hearted Moose as The Birthday Bird	The Wubbulous World of Dr. Seuss "The Birthday Moose"	Thidwick impersonates the Birthday Bird since the Birthday Bird was captured in the ice.
	Two-Headed Monster as a two-headed chicken	Sesame Street	In a Journey to Ernie segment.
	Uncle Traveling Matt as a pig	Fraggle Rock "I Want to Be You"	Matt dresses as a pig to fit in on a hog farm.
	Undercover Rover as a penguin	Muppet Time	Undercover Rover poses as a penguin to learn how they keep warm.
	Wembley as a fly	Fraggle Rock "Space Frog Follies"	Wembley dresses as a fly to attract a frog.
	Wolfgang the Seal as a penguin	Sesame Street Episode 3145	Wolfgang dresses up as a penguin to get into the Furry Arms' penguin party and scarf down their supply of fish.
	Wolle as a cat	Sesamstrasse Folge 2398	The gang impersonates the Musicians of Bremen.
	Zoe as a tiger	Sesame Street episode 3159	Zoe explains that her tiger suit is her plan to avoid being tickled by Aunt Chloe.
	Zoe as the Bird	Elmo's Musical Adventure: Peter and the Wolf	Zoe plays the role of the Bird, another Peter and the Wolf animal.
	Zoe as a wolf	Sesame Street episode 4095	Elmo and Zoe dress up as wolves for their Big Bad Wolf auditions.
	Zoe as the Dormouse	Abby in Wonderland	A miniature version of the Zoe puppet was created specifically for this direct-to-DVD film.
Illustrated Impersonations
	Baby Fozzie as a lion	Muppet Babies' Classic Children's Tales	As the Cowardly Lion, from the Wizard of Oz story.
	Baby Fozzie as the March Hare	Muppet Babies Storybook Calendar 1990	A photo puppet of Baby Fozzie appears as the March Hare at the Mad Tea-Party in the 1990 Muppet Babies Storybook Calendar and the companion book Muppet Babies' Classic Children's Tales.
	Bert as a cat	Sesame Street Magazine cover, June 1991	Bert dressed as a cat.
	Bert as a pigeon	Sesame Street Halloween card	Bert dresses up as a pigeon to go trick-or-treating.
	Bert as a pigeon	The Sesame Street Dictionary	Bert dresses up as a pigeon for Halloween.
	Betty Lou as a Tiger	Sesame Street storybook Happy and Sad, Grouchy and Glad	Betty Lou dresses up as a Tiger for a pageant.
	Big Bird as an alligator	Sesame Street Halloween card	Big Bird dresses up as an alligator to go trick-or-treating.
	Cookie Monster as a cow, Ernie as a dog, Bert as a hen, Grover as a Sheep, Herry as a pig	The Little Red Hen	Dressed in character for a Sesame Street Pageant.
	Cookie Monster as the Wolf	The Sesame Street Players Present Peter and the Wolf	Dressed in character for a Sesame Street Pageant.
	The Electric Mayhem as dogs	The Muppet Show Comic Book: Muppet Mash	Animal, Dr. Teeth, Janice, Floyd, and Zoot dress as dogs for Howlin' Jack Talbot's song, "Doggone Dallas Blues".
	Ernie as a Twiddlebug	Sesame Street Halloween card	Ernie dresses up as a Twiddlebug to go trick-or-treating.
	Ernie as a butterfly	Sesame Street Magazine cover, June 1991	Ernie dressed as a butterfly.
	Elmo as a fish, Telly Monster as a cat	Sesame Street storybook Happy and Sad, Grouchy and Glad	Dressed in character for a Sesame Street Pageant.
	Fozzie Bear as a lion	Look-in	As the Cowardly Lion, from the front cover of the 1981 issue of Look-in.
	Fozzie Bear as a lion	Look and Find Muppets	As the Cowardly Lion, from the "Wizard of Oz" page.
	Miss Piggy as a bear	The Muppet Show Comic Book: Family Reunion issue #6	Miss Piggy dresses in a bear costume to help raise money for Robin.
	Oscar the Grouch as a wolf	Sesame Street storybook Ernie and His Merry Monsters	Oscar is auditioning for the role of The Big Bad Wolf.
	Ernie, Bert, and Herry Monster as The Three Bears	The Sesame Street Dictionary	A Sesame Street Pageant featured the trio dressed as the fabled bears.