Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

James Etheridge, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Virginia Tech Learning Resources Center , Virginia Polytechnic Institute and State University, Bugwood.org

Virginia Tech Learning Resources Center , Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org