Hellström, Magnus. “A Rare Case of a First-Winter Male Hybrid Common Redstart Phoenicurus Phoenicurus × Black Redstart P. Ochruros Ringed at Ottenby, Sweden”. Ornis Svecica 32 (January 13, 2023): 80–86. Accessed November 22, 2024. https://journals.lub.lu.se/os/article/view/23819.