• Source: List of penguins

Penguins are birds in the family Spheniscidae in the monotypic order Sphenisciformes. They inhabit high-productivity marine habitats, almost exclusively in the Southern Hemisphere; the only species to occur north of the Equator is the Galapagos penguin. The only group of birds other than the ratites to be entirely flightless, penguins are extremely adapted to their aquatic lifestyle, with a streamlined shape that minimizes drag, countershaded dark-and-white plumage, dense bones, powerful flippers, and insulating feathers that allow them to withstand very low temperatures on land and in water.
There are currently 18 extant species of penguins recognised by the International Ornithologists' Union, distributed among six genera. Many species of fossil penguins are known from the Paleocene onwards; however, their exact number and taxonomy are unsettled due to ongoing discoveries.




Conventions



Conservation status codes listed follow the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Range maps are provided wherever possible; if a range map is not available, a description of the penguin's range is provided. Ranges are based on the IOC World Bird List for that species unless otherwise noted. Population estimates are of the number of mature individuals and are taken from the IUCN Red List.
This list follows the taxonomic treatment (designation and order of species) and nomenclature (scientific and common names) of version 13.2 of the IOC World Bird List. Where the taxonomy proposed by the IOC World Bird List conflicts with the taxonomy followed by the IUCN or the 2023 edition of The Clements Checklist of Birds of the World, the disagreement is noted next to the species's common name (for nomenclatural disagreements) or scientific name (for taxonomic disagreements).




Classification


The International Ornithologists' Union (IOU) recognises 18 species of penguins in six genera. This list does not include hybrid species, extinct prehistoric species, or putative species not yet accepted by the IOU.
Family Spheniscidae

Genus Aptenodytes: two species
Genus Pygoscelis: three species
Genus Eudyptula: one species
Genus Spheniscus: four species
Genus Megadyptes: one species
Genus Eudyptes: seven species




Penguins






Fossil species






= Basal sphenisciformes

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= Advanced sphenisciformes

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= Extinct species of extant genera

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= Poorly understood taxa

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Invalid taxa


The Early Oligocene genus Cruschedula was formerly thought to belong to Spheniscidae; however, re-examination of the holotype in 1943 resulted in the genus being placed in Accipitridae. Further examination in 1980 resulted in placement as Aves incertae sedis.




Notes






References

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