The Indian Skimmer (Rynchops albicollis) is a one of the three species that belong to the skimmer family. They are somewhat tern like but like other skimmers, have a short upper mandible and the longer lower mandible that is ploughed along the surface of water as the bird flies over the water to pick aquatic prey. It is found in southern Asia where it is patchily distributed and declining in numbers. They are mainly found in rivers or estuaries. They are very brightly marked in black, white and orange.
Source : Wikipedia