Houston, C. Stuart, Dwight G. Smith and Christoph Rohner. 1998. Great Horned Owl (Bubo virginianus)', The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/372
Monson, Gale. “Great Blue Heron Killed by Bobcat.” The Wilson Bulletin, vol. 63, no. 4, 1951, pp. 334–334. JSTOR, http://www.jstor.org/stable/4158020. Accessed 5 Feb. 2023.
Worcester, Robyn (23 February 2014). "Great Blue Heron FAQ"(PDF). stanleyparkecology.ca. Stanley Park Ecology Society. Archived from the original(PDF) on 18 September 2015. Retrieved 2 August 2017.
Short, Henry L. and Cooper, Robert J. (1985). Habitat suitability index models Great blue heron. Biological report 82(10.99). Washington, DC : Western Energy and Land Use Team, Division of Biological Services, Research and Development, Fish and Wildlife Service
uwi.edu
sta.uwi.edu
Gunpat, Sacha (2012). "Ardea herodias (Great Blue Heron)"(PDF). The Online Guide to the Animals of Trinidad and Tobago. The University of the West Indies at St. Augustine, Trinidad and Tobago.
Worcester, Robyn (23 February 2014). "Great Blue Heron FAQ"(PDF). stanleyparkecology.ca. Stanley Park Ecology Society. Archived from the original(PDF) on 18 September 2015. Retrieved 2 August 2017.