Poole, Timothy F., and Gordon Ogilvie. “Occupancy of Unconventional Nest and Roost Habitats by the Chimney Swift (Chaetura Pelagica) in Manitoba”. Blue Jay 78, no. 1 (February 1, 2020): 10–15. Accessed August 1, 2021. https://bluejayjournal.ca/index.php/bluejay/article/view/6289.