The influence of the decrease in the water level in the Caspian Sea on certain species within the Gulls (Laridae) family

In 2013-2023, the influence of the water level decrease in the Caspian Sea on the reproductive behaviour of the migratory-nesting species of Chroicocephalus ridibundus, Chlidonias niger, Chlidonias leucopterus, Chlidonias hybrida, Gelochelidon nilotica, Thalasseus sandvicensis, Sterna hirundo, Hydroprogne caspia which are in the Gizilaghaj Bay, was studied. Thousands of the migratory-nesting bird populations came to Azerbaijan from Africa and South-Eastern Asian countries and breed in the Gizilaghaj Bay of the Caspian Sea. As a result of the water level decrease in the Caspian Sea, the difference in the water level in the Northern and Southern parts of Little Gizilaghaj Bay caused a change in the reproductive behaviour of the species mentioned above of the Laridae family, which have been formed over many years.