Bjorge, Ronald R., and Henk P. L. Kiliaan. “Densities of Loggerhead Shrike on Study Blocks In Southeastern Alberta Inventoried in Both 1993 and 1996”. Blue Jay 55, no. 4 (December 1, 1997). Accessed November 22, 2024. https://bluejayjournal.ca/index.php/bluejay/article/view/5168.