Schmutz, Josef K., C. Stuart Houston, and Geoffrey L. Holroyd. “Southward Migration of Swainson’s Hawks: Over 10,000 Km in 54 Days”. Blue Jay 54, no. 2 (June 1, 1996). Accessed April 18, 2024. https://bluejayjournal.ca/index.php/bluejay/article/view/5253.