Recent studies show the northern rockhopper penguin, Moseley's rockhopper penguin, or Moseley's penguin (Eudyptes moseleyi) distinct from the southern rockhopper penguin. A study published in 2009 showed that the population of the northern rockhopper had declined by 90% since the 1950s. For this reason, the northern rockhopper penguin is classified as endangered.
- It played Buttercup in The Powerpuff Penguins, The Powerpuff Penguins Movie, and The Powerpuff Penguins (2016)
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