Masani barrage act as wintering spot for wide range of migratory as well as residential avian species. Their population estimation is to comprehend group dynamics, niche relationships, habitat preferences, and other behavioral features. An ornithological survey was conducted at Masani barrage, district Rewari, Haryana from April 2022 to March 2023 with the help of scan sampling and point count methodology. A total of 150 bird species belonging to 18 orders and 49 families were recorded, among which 94 species were resident; 47 species were winter migrant and 9 species were summer migrant of the observed feeding guilds, Carnivores were the highly dominated followed by Insectivores (41 species), Omnivores (36 species), Herbivores (9 species) and others. Species such as Ferruginous Pochard, Black-tailed Godwit, Eurasian Curlew, Asian woollyneck, Painted stork, Black-necked Stork, Rufous-vented Grass-babbler, Black-headed Ibis, Lesser Flamingo, Oriental Darter and Alexandrine parakeet fall under near-threatened (NT) category of IUCN Conservation status. Data collected from avifaunal species at the barrage can be utilized as a baseline for analyzing future perspectives and developing appropriate management plans for protection and long-term use.