Fig. 1. Differences in coloration of the outer primaries of Larus michahellis (left column) and Larus cachinnans (right column) from the Black Sea coast. A — Kobuleti, Georgia. August 20, 1910 (collection of the National Museum of Natural History, the National Academy of Sciences of Ukraine), B — Karadag, Crimean Peninsula, Ukraine, July 2, 1946; (collection of the Zoological Museum of Kyiv National University), C — Vilkovo, Danube Delta, Ukraine, April 26, 1948 (collection of the Zoological Museum of Kyiv National University), D — Swan Islands, Karkinitian Bay, Ukraine, February 22, 1972 (collection of the National Museum of Natural History of the National Academy of Sciences of Ukraine).

Published as part of Tsvelykh, A. N., 2022, Distribution Of Sibling Species Yellow-Legged Gull, Larus Michahellis And Caspian Gull, Larus Cachinnans (Charadriiformes, Laridae), On The Black Sea Coast, pp. 165-170 in Zoodiversity 56 (2) on page 166, DOI: 10.15407/zoo2022.02.165, http://zenodo.org/record/7175639