Peiró, Ignacio G., and Emilio Pagani-Núñez. “Plumage Colouration Variability of Male Bluethroats (Luscinia Svecica Cyanecula) Wintering in SE Iberia”. Ornis Fennica 93, no. 2 (July 1, 2016): 111–120. Accessed April 19, 2025. https://ornisfennica.journal.fi/article/view/133893.