Leonova Anastasia A. RussiaMoscowPeoples' Friendship University of Russia named after Patrice Lumumba, 6 Miklukho-Maklaya St., Moscow 117198, Russia1032200567@rudn.ru Author's articles Size and age changes in color in the Rapid racerunner, Eremias velox (Pallas, 1771) (Reptilia, Lacertilia) population on the Sarycum sandy massif