Cooke, Fred2013-03-062013-03-0606/03/2013http://hdl.handle.net/10315/20790Decline in body size (as measured by tarsus) over time. Birds are getting smaller with each successive year of the study.enLesserSnowGeeseGooseBodySizeLengthTarsusFred CookeFredCookeChurchillManitobaPhotograph