Penguins are not a trope on their own. You may be looking for one of the following:
- Cartoon Penguin: Stock cartoon portrayal of a penguin being black and white with no species-specific details.
- Flying Flightless Bird: Penguins (or any other flightless bird) are able to fly in the work.
- Penguins Are Ducks: Penguins given duck attributes due to unfamiliarity with penguins.
- Polar Bears and Penguins: Penguins and polar bears co-existing in a work even though they don't in real life.
- Polar Penguins: Penguins used as a visual shorthand for cold climates.
If a direct wick has led you here, please correct the link so that it points to the corresponding article.