PESCHKEN, D. P. Analysis of Observations Based on Thirteen Years of Participating in the Feederwatch Project. Blue Jay, [S. l.], v. 74, n. 4, p. 28–29, 2016. DOI: 10.29173/bluejay363. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/363. Acesso em: 17 oct. 2021.