The research was carried out on the reservoirs of Transnistria, confined to settlements in 2020-2023. At this moment, the adaptation and differences in the behavior of the conditionally synanthropic avifauna of reservoirs with wetland birds living outside the settlements were determined. The adaptive behavior of 4 bird species of the target group was analyzed, these species are found in all reservoirs of the studied territory. Anas platyrhynchos is the most plastic species, adapting to anthropogenic changes in natural habitat conditions and undergoing synanthropization. Micropopulations of these ducks within the settlements, let a person close enough and take fertilizing. However, birds that are not part of the grouping confined to the reservoir of the settlement do not let a person close. Cygnus olor – is rare in nesting, but during migrations, bird flocks in some areas reach 200 individuals. To a greater extent, the behavior of swans was influenced by the ban on hunting and feeding birds, especially in winter. Swans do not have a clear division into "residential" and "wild" groups. Birds that are located on the reservoirs of settlements are cautious when a person appears, but they let humans get much closer than other goose-like species. Fulica atra is a common species in all reservoirs of the research zone. In recent decades, this species has increasingly appeared in the reservoirs of settlements. In nature, Fulica atra are very cautious and secretive birds, but there is a decrease in fear of humans, this is especially noticeable at the Kuchurgan reservoir, therefore, in the area of the Pervomaisk-Kuchurgan bridge, birds let humans very close and take food. In general, the change in the behavior of these birds is poorly expressed in the reservoirs of the studied zone. Acrocephalus arundinaceus is a numerous species in the research area. This species has recently settled quite widely in natural habitats within the boundaries of settlements. This species does not experience much anxiety near a person, and even uses artificial materials when building a nest. The nest found on the city stream "Kolkotovy" was constructed of dry stems, leaves, fluff, rags, paper and placed on reed stems at a height of about 1 m from the water surface. Thus, birds have adapted to the neighborhood with people and even enjoy some of the advantages of such a neighborhood.