References

• Alström, P, and Sundev, G. (2020). Mongolian Short-toed Lark Calandrella dukhunensis, an overlooked East Asian species. Journal of Ornithology 162: 165-177.

• Haas, M, and Crochet, P A. (2012). Western Palearctic list updates: Von Schrenck’s Bittern.

Dutch Birding 34: 168-171.

• Leader, P, Carey, G, and Schweizer, M. (2021). The identification, taxonomy and distribution of Western, Siberian and Asian House Martins.

British Birds 114: 72-96.

• Kennerley, P R, and Prys-Jones, R P. (2006). Occurrences of Gray’s Grasshopper Warbler in Europe, including a further case of Meinertzhagen fraud. British Birds 99: 506-516.

• Kennerley, P, and Pearson, D. (2010). Reed and Bush Warblers. A & C Black, London.

• Ktitorov, P, Ivanov, S, Kornilova, E, Kulikova, O, Ris, H, Sokolovskis, K, and Solovyeva, D. (2021). Shrub-dwelling species are joining the Arctic passerine bird community in the Chaun Delta (Western Chukotka, Russia). Polar Biology

44: 1847-1857.