Grades 7-12. Students learn about predator-prey relationships through the analysis of owl pellets. Highly motivational for regular class or independent study. Teacher and student guides include easy-to-follow directions. Illustrations identify skulls of common prey species and charts are provided for students to record the data collected. Students learn about energy transfer through food chains while observing skeletal features which identify prey animals consumed by owls. Additional studies can be conducted to evaluate animal populations within the owl’s habitat, make calculations to estimate biomass of the prey animals, or investigate the skeletal anatomy from the taxonomic features of the prey animals. Kit includes 15 dried and fumigated owl pellets wrapped in aluminum, probes, vole chart, 15 student worksheets, and teacher’s guide.