Penguins are not a trope on their own. You may be looking for one of the following:

* CartoonPenguin: Stock cartoon portrayal of a penguin being black and white with no species-specific details.
* FlyingFlightlessBird: Penguins (or any other flightless bird) are able to fly in the work.
* PenguinsAreDucks: Penguins given duck attributes due to unfamiliarity with penguins.
* PolarBearsAndPenguins: Penguins and polar bears co-existing in a work even though they don't in real life.
* PolarPenguins: 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.
----