Marova, I., Ivanitskii, V., Ilina, I., Pecheneva, A., Kvartalnov, P., Belocon, Y. and Belokon, M. (2024) “A new contact zone in the Chiffchaff distribution range: Caucasian and European subspecies meet each other in the south of Russia”, Ornis Fennica, 101(1–2), pp. 00–00. doi: 10.51812/of.131719.