1. Alabama Public Health Department. 2020. Alabamians urged to take responsibility and slow transmission of COVID-19. 12 November 2020. Available at https://www.alabamapublichealth.gov/blog/2020/11/23.html [Last accessed 17 March 2022].
2. Birds seen and not seen during the COVID-19 pandemic: The impact of lockdown measures on citizen science bird observations;Biological Conservation,2021
3. The Christmas Bird Count and avian ecology;Studies in Avian Biology,1981
4. Over 30 years of standardized birds counts at supplementary feeding stations in North America: A citizen science data report for Project FeederWatch;Frontiers in Ecology and Evolution,2021
5. California Department of Public Health. 2020. State officials announce latest COVID-19 facts. 1 December 2020. Available at https://www.cdph.ca.gov/Programs/OPA/Pages/NR20-319.aspx [Last accessed 17 March 2022].