Marling, Sven. “Density of Chiffchaffs Phylloscopus C. Collybita and Willow Warblers Phylloscopus Trochilus in a South Swedish Villa Suburb”. Ornis Svecica 24, no. 3–4 (October 1, 2014): 99–105. Accessed November 22, 2024. https://journals.lub.lu.se/os/article/view/22555.