I became so much of a penguin expert in my youth that I since have felt like I knew everything and stopped learning. Cue me only just learning tonight that my little kid hyperfixation info is outdated and there are two species of rockhopper penguin and not one. Which species is kept in zoos, the Southern or the Northern? This is particularly important to me in regards to the rockhoppers at Detroit, Omaha, and Saint Louis, as those are the three facilities where I have seen them.