Kalcounis, Matina C., Ryan D. Csada, and R. Mark Brigham. “The Status and Distribution of the Common Poorwill in the Cypress Hills, Saskatchewan”. Blue Jay 50, no. 1 (March 1, 1992). Accessed July 2, 2024. https://bluejayjournal.ca/index.php/bluejay/article/view/5321.