1. American Ornithological Society (AOS). (2020). Checklist of North and Middle America birds: Family Paridae. Retrieved 20 May, 2021, from http://checklist.americanornithology.org/taxa/133.
2. American Ornithologists' Union (AOU). (1998). Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. Retrieved 20 May, 2021, from http://www.aou.org/.
3. Avibase. (2021). The World bird database. Carolina chickadee. Retrieved 20 May, 2021, from https://avibase.bsc-eoc.org/species.jsp?avibaseid=F941AAD38D7BA54D.
4. Berto, B. P., Flausino, W., McIntosh, D., Teixeira-Filho, W. L., & Lopes, C. W. G. (2011). Coccidia of New World passerine birds (Aves: Passeriformes): A review of Eimeria Schneider, 1875 and Isospora Schneider, 1881 (Apicomplexa: Eimeriidae). Systematic Parasitology, 80, 159–204. https://doi.org/10.1007/s11230-011-9317-8
5. Boughton, D. C., Boughton, R. B., & Volk, J. (1938). Avian hosts of the genus Isospora (Coccidiida). Ohio Journal of Science, 38, 149–163.