This Tuesday of National Zookeeper Week, we appreciate Mandi Nordin, a bird keeper at the Saint Louis Zoo, who participated in the 5th Humboldt penguin health assessment from May 29-June 9 in Punta San Juan, Peru. She and her team collected samples from 51 penguins. Learn more about the Zoo's work in Peru: http://stlzoo.org/wildcareinst​itute/humboldtpenguinsinperu/.