Following the research of the avifauna of the "Lower Prut Lakes" Ramsar site territory, carried out in the period 2018-2023, 13 species belonging to the Pelecaniformes order were identified. The classification of birds was carried out according to Avibase - Bird World Database and BirdLife International. Out of the total number, 8 species: Pelecanus onocrotalus, Pelecanus crispus, Botaurus stellaris, Ardeola ralloides, Ardea alba, Ardea purpurea, Plegadis falcinellus, Platalea leucorodia, have the status of rare species, protected at national and international level. In phenological aspect, the pelecaniformes registered in the Lower Prut sector have the status of summer guests, some solitary specimens were also observed during winter (Botaurus stellaris, Ardea alba, Ardea cinerea, rarely Platalea leucorodia). Among the 9 species of Ardeidae, the rarest one was Bubulcus ibis, recorded only two times (May, December 2021). The pelecans Pelecanus crispus and Pelecanus onocrotalus visit the area in search of food during the warm season of the year. Small groups or solitary specimens appear for a few days in winter as well. During the summer Pelecanus onocrotalus is the most numerous, with 200-2500 individuals. These birds fly between different bodies of water in search of fish to feed on. They can be frequently seen on Beleu and Manta lakes until September. Except for the Bubulcus ibis species, the herons are attracted to available nesting sites in the area. However, due to changes in the ecosystems and the influence of environmental factors, especially the persistent drought in recent years, the reproduction of these birds sometimes fails. The species from fam. Threskiornithidae Plegadis falcinellus and Platalea leucorodia are summer guests, but also passage species. The number of nesting pairs is very low, and they were noted in the colonies from the swamp sectors of Manta and Beleu lakes. The other sectors are visited for foraging. Starting in July, hundreds of specimens can be seen at the water's edge forming groups and preparing for migration.