The Ranjit Sagar wetland, a critical aquatic ecosystem supporting diverse flora and fauna, has been the subject of investigation from January 2013 to January 2015. The study revealed the presence of 167 avian species across 19 orders and 52 families. Notably, areas with minimal disturbance within the wetland serve as key niches for a substantial avian population, encompassing 47.31% migrant and 52.69% resident species. Significantly, 10 Near Threatened species, alongside the Vulnerable Common Pochard Aythya ferina and the Endangered Egyptian Vulture Neophron percnopterus, underscore the wetland’s conservation value. Dominated by order Passeriformes (55 species), followed by Charadriiformes (29 species), and Anseriformes (20 species), the avian community exhibits varied feeding guilds, with insectivores (37.13%), omnivores (18.56%), aquatic animal feeders (16.16%), carnivores (14.97%), frugivores (5.39%), granivores (4.79%), and herbivores (3%) comprising its composition. This study elucidates the intricate avian ecosystem’s dynamics in Ranjit Sagar wetland, emphasizing its conservation significance and ecological structure, thereby contributing valuable insights for preservation and future research.

Diversity of fishes was evaluated at the Ranjit Sager Wetland and its three adjoining streams. Factors like altitude, bed gradient, dominated substratum and habitat types of the streams have also been studied. These streams fall under Type-B category on the basis of habitat variability, gradient and sinuosity. 43 fish species represented by 6 orders have been reported from the study area. Out of all 43 fish species, 13 come under threatened categories of Red List of IUCN, out of which 2, 3 and 8 come under Endangered (EN), Vulnerable (VU) and Low Risk near threatened category (LRnt) respectively. It has been analyzed from the above pattern that maximum fish species reported from this wetland have fallen under different threatened categories.

Wetlands are vital water bodies, these are as crucial in a natural ecosystem as a kidney in a human body. Their role is very complex and varied in different aquatic ecosystems. Apart from being highly productive as the habitat of birds, fishes and variety of other aquatic life forms, including microorganism, wetlands also provide other ecosystem services, from maintaining the natural balance to sustaining human livelihoods1.