This paper reflects the degree of bird urbanization evolution on the example of Chiinu city. 93 recorded species on the territory of the city were classified into the following synanthropic groups: mandatory – 9 species, facultative – 53 species, provisional – 21 species, and 9 species of birds were neutral. The largest group is the facultative one with 53 species, which shows that urban areas provide favourable conditions similar to natural environment to the species with a high degree of plasticity and allow them to find favourable conditions for breeding and feeding in city parks and squares. The urban ecosystem is not to be neglected from ornithological point of view.