The purpose of this lesson is to simulate feeding practices of breeding eagles in a helpful or stressful situation to Grade 10 high school students. This activity works well near the end of a unit on Ecology. Students should have a basic understanding of biotic and abiotic factors, populations, niches, habitats and feeding relationships because once the activity is completed, students will be able to identify these characteristics of bald eagles. This teaching resource was developed by a K-12 science teacher in the American Physiological Society’s 2007 Frontiers in Physiology Program. For more information on this program, please visit