Icadyptes and Inkayacu

Reconstructions of the prehistoric penguins Icadyptes salasi (top) and Inkayacu paracasensis (bottom). From the late Eocene of Peru. In life, both birds would have stood about 5 feet tall.

Inkayacu is the first fossil penguin found with feathers: these feathers show that it had a red underbelly, and gray back.