While lethal collection and gnarly lab work is the gold standard for measuring body condition of waterfowl, scientists also need non-lethal methods to answer other research questions. Katharine Cody, graduate student from the Univ. of Arkansas at Monticello, explains the importance of winter body condition for ducks and describes her research that sought to identify a reliable, non-lethal way to measure it for Arkansas mallards.  www.ducks.org/DUPodcast