Imagine an emperor penguin, the biggest of all living penguins at 3 feet tall. Seems pretty tall for a penguin, right? Now imagine a penguin that's on average 5 feet tall and you have the giant penguin Inkayacu paracasensis.
The fossils of Inkayacu were first found in Peru and described in 2010. The "Water King" wasn't the tallest of fossil penguins, though. That title goes to the 6-foot-tall Palaeeudyptes klekowskii, discovered in 2014 in Antarctica.
However, what Inkayacu lacks in height, it makes up in feathers. It had unusual coloration for a penguin. As researchers uncovered Inkayacu's left forearm bones, they revealed a swath of fossilized feathers.