A diverse group of avian species that are uniquely adapted to aquatic habitats ranging from freshwater wetlands to saltwater marine ecosystems. They have specialised morphological traits such as webbed feet, well-formed waterproof plumage, salt glands and a variety of beaks that enable these birds to survive and utilisation of resources in aquatic environments. Ecological factors like habitat quality, food availability, migration and predation as well as anthropogenic pressures including wetland drainage, pollution, agriculture and urbanisation greatly influence the composition of waterbird communities. Feeding ecology reflects both the morphological adaptations of waterbirds and their habitat-specific strategies. Waterbirds occupy a wide range of dietary guilds. These guilds include mostly piscivorous, insectivorous, molluscivorous, crustacean-eating, herbivorous, omnivorous and scavenging aquatic birds. The foraging techniques of these birds include snipping, diving, probing, sifting, filtering and surface feeding. Their foraging habits are also determined by the type of habitat like mudflats, vegetated wetlands, coastal areas and open water. These ecological specialisations and their adaptations are indicative of biodiversity, highlighting the important role of waterbirds as an integral component of aquatic ecosystems.