Not all birds possess the ability to fly; in fact, there's a good number of birds who can't. The reasons vary between each flightless bird, but the most common reason is that their wings were not made for flying.
Despite this, the are plenty of times in media in which a bird that shouldn't be able to fly actually does. It could be just one of its kind, or the entire breed. In any case, if you see any birds known to be unable to fly in any source of media showing the ability to fly, they belong on this list.
Note that if the flightless bird is using some sort of tool to fly (like an airplane or a jetpack), then it does not count since without it, the bird would truly be flightless.
While not completely flightless, chickens may also count for this list too on account of how their ability to fly only gets them 10 feet off the ground. If the chickens can go any higher than that, they qualify.
Contrast Acrophobic Bird, for when birds who can fly don't fly for one reason or another.
- The Pebble and the Penguin: On his introduction, Rocko tells Hubie that his wish in life is to fly, despite the fact that he is a penguin. Near the end of the film, he actually does and teaches other penguins how to fly.
- Madagascar: The opening scene has Marty running through a savannah. However, when the chorus of penguins take off and fly in formation, it's a clue to the viewer it's just a dream sequence.
- A plot point in Chicken Run is the chickens trying to learn how to fly from a rooster named Rocky after Ginger saw him flying. It turns out Rocky didn't actually fly, he was just shot out of a cannon.
- Downplayed by Expresso the Ostrich from Donkey Kong Country, who can't fly but can flap his wings when falling to slow his descent and give the player more control on where he lands.
- Kirby: King Dedede is a possible example. He looks to possibly be a penguin, and just like Kirby, he can fly by puffing up like a balloon.
- In Joust, one of the players' mounts is a flying ostrich.
- Mega Man X:
- Implied to be the case with Overdrive Ostrich in Mega Man X2. He used to be able to fly, but an accident robs him of his flying capabilities. He's still good at running fast as an ostrich would.
- Burn Rooster from Mega Man X8, is capable of flying despite being based on a mostly flightless bird, in contrast to Overdrive Ostrich.
- Plants vs. Zombies 2: It's About Time has the Dodo Rider Zombie fought in Frostbite caves. It's normally a grounded mook, but when it encounters some plants like Spikeweed or ice floes the dodo frantically flaps its wings to fly, temporarily becoming an Airborne Mook until it passes the threat.
- Doduo and Dodrio are based off of an ostrich, which is known for not being able to fly. Its Pokedex entry in Pokémon Sun and Moon even says that it can't fly well. Nevertheless, it is still able to learn the move Fly. Some of the 3D games have them achieve this by running in place.
- Delibird is also capable of learning Fly even though it is essentially a penguin.
- Sgt. Byrd from Spyro: Year of the Dragon is a military penguin who has missiles strapped to him. He is also capable of flying be flapping his little penguin flippers. Handwaved by how he's trained by the hummingbirds to flap his flippers fast enough. This is later averted with the use of a jet-pack in Spyro: A Hero's Tail.
- Levels in Super Mario Odyssey have small birds which look different in each level; they fly away as Mario approaches. The birds in Shiveria are tiny penguins, which fly just as well as the others.
- Some of the enemy penguins in Super Mario World 2: Yoshi's Island flap around in midair unless Yoshi stuffs them in his mouth and spits them out, after which they'll simply waddle around like the other penguins.
- Ark Survival Evolved has a downplayed pterosaur variant. The Quetzalcoatlus is shown to remain airborne constantly (this is reflected by it's low stamina drain when you tame it) and never landing, however fossil evidence seems to indicate that it was much more terrestrial than other pterosaur groups and would likely only take flight to escape larger predators.
- The Foxbusters: This British cartoon features three chickens capable of flight, and they use their unusual power to protect their farm from foxes.
- Pocoyo: In the episode "Chicks Dig Me", Pocoyo found three eggs that hatched into little chicken that can't be controlled. When Pato found them, he finally can control them and teaches them how to stay quiet and still, to skate and even to fly for the surprise of all (the narrator included).
- One episode of The Simpsons has a scene in which Lisa opens the door of a penguin habitat that has been closed for repairs and discovers the penguins flying.
- In a much earlier episode back in season 6, when Bart's comet's shadow loomed over the Springfield zoo and over the penguin exhibit, the birds then took flight to escape.
- The Critic: Played for Laughs when Franklin discovers his airline pilot is a penguin — who's been drinking.
Franklin: Wait a minute — penguins can't fly. PENGUINS CAN'T FLY!
- There are some birds that can be considered "semi-flightless"— their wings and flight muscles have degenerated to the point that they are for all intents and purposes flightless, but they can still fly short distances if they absolutely have to. Examples include the Okinawa rail of Japan, the Laysan duck of Hawaii, and the Zapata rail of Cuba.