Agarwal, Neha, and Ila Mishra. “Circannual Rhythms in Birds”. IJRDO - JOURNAL OF BIOLOGICAL SCIENCE 3, no. 2 (February 28, 2017): 09-22. Accessed January 7, 2025. http://cpcalendars.ijrdo.org/index.php/bs/article/view/1564.