Pisco penguins

Skeletal reconstructions of three varieties of fossil penguins from the Miocene of the Pisco Formation, Peru, compared with the Humboldt penguin (the only species that currently inhabit the area). Left to right: Humboldt penguin (Spheniscus humboldti), Spheniscus muizoni, Spheniscus sp., Spheniscus megaramphus.