Linked from

The 22 pages that link to Penguin, each with the reason it gives.

• Countercurrent exchangeBroader topic: Blood vessels in penguin legs can exchange heat countercurrently and limit heat loss.

• SeabirdBroader topic: Penguins are seabirds whose wings evolved into flippers rather than flight surfaces.

• CountershadingBroader topic: Its coloration provides a clear countershaded pattern in an aquatic setting.

• Salt glandBroader topic: Nasal salt glands help penguins manage salts taken in with seawater and prey.

• Marine mammalCompared with: Penguins are warm-blooded marine animals, but they lay eggs and feed chicks with regurgitated food.

• Bergmann's ruleNarrower topic: Penguin species provide a familiar comparison of body size across contrasting climates.

• Emperor penguinNarrower topic: Emperor penguins are the largest living members of this bird family.

• Adélie penguinNarrower topic: Adélie penguins are one of the Antarctic species within this broader group.

• King penguinNarrower topic: King penguins belong to this distinctive group of aquatic birds.

• WaterbirdBroader topic: Penguins show how aquatic specialization can replace flight.

• Bird wingBroader topic: Penguins show how a bird wing can specialize for swimming rather than aerial flight.

• Wing-propelled divingBroader topic: Penguins are the clearest specialists in propulsion by flapping wings beneath the surface.

• African penguinNarrower topic: The African penguin is one species within the broader penguin family.

• Little penguinNarrower topic: The little penguin is the smallest living member of this distinctive seabird group.

• Colin FarrellBroader topic: Farrell reprised his Batman villain role in a series focused on the character.

• HalszkaraptorCompared with: Penguins illustrate a clear skeletal route to aquatic propulsion unlike Halszkaraptor’s debated adaptations.

• Austral storm petrelCompared with: Penguins share Southern Ocean habitats but are flightless divers rather than aerial foragers.

• Falkland Islands wolfRelated: Penguins and their eggs were among plausible coastal food sources for the warrah.

• InkayacuNarrower topic: Inkayacu belongs to the evolutionary history of penguins.

• PlotopteridaeCompared with: Penguins offer a living comparison for a similar diving adaptation reached independently.

• Polar regionsBroader topic: Several penguin species live in Antarctic and subantarctic environments.

• SkuaRelated: Skuas prey on penguin eggs and chicks at some breeding colonies.