JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY
Extinct and living penguin comparison. Illustration comparing the extinct species of penguin and modern penguins. From left to right; extinct species: Waimanu manneringi, Delphinornis larseni, Perudyptes devriesi, Icadyptes salasi (swimming, left), Inkayacu paracasensis, Palaeeudyptes gunnari, Kairuku waitaki, Paraptenodytes antarcticus (swimming, right), Inguza predemersus; and living species: the emperor penguin (Aptenodytes forsteri), and Galapagos penguin (Spheniscus mendiculus). The Emperor penguin is the largest of all living penguin species, at around 1.2 metres. However, some extinct species, such as Kairuku waitaki, grew to 1.5 metres, and certain species were even larger than this.
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