1. D. Ackerman, Golden monkeys. The New Yorker (24 June 1991), p. 36
2. American Prairie Reserve, (2020), https://en.wikipedia.org/wiki/American_Prairie_Reserve. Accessed 7 Dec 2020
3. J. Dalley Whooping crane migration changes course (2016). https://www.sierraclub.org/sierra/2016-5-september-october/green-life/whooping-crane-migration-changes-course. Accessed 14 Dec 2020
4. Defenders of Wildlife, Viruses threaten wildlife too (2020). https://defenders.org/blog/2020/03/viruses-threaten-wildlife-too. Accessed 20 Feb 2021
5. J.H. Dieterich, A.R. Hibbert, Fire history in a small ponderosa pine stand surrounded by chaparral, in Effects of Fire Management of Southwestern Natural Resources: Proceedings of the Symposium, Tucson, AZ, November 14–17, 1988. General Technical Report RM-GTR-191, ed. by J. S. Kramer, (USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, 1990), pp. 168–173