petrel Northern storm petrels Order: ProcellariiformesFamily: Hydrobatidae The northern storm petrels are relatives of the petrels and are the smallest seabirds. They feed on planktonic crustaceans and small fish picked from the surface, typically while hovering. The flight is fluttering and sometimes bat-like. Swinhoe's storm petrel Petrels, shearwaters, and diving petrels Order: ProcellariiformesFamily: Procellariidae The procellariids are the main group of medium-sized "true petrels", characterised by united nostrils with medium septum and a long outer functional primary. Streaked shearwater Wedge-tailed shearwater Flesh-footed shearwater Tropical shearwater Storks Order: CiconiiformesFamily: Ciconiidae Storks are large, long-legged, long-necked, wading birds with long, stout bills. Storks are mute, but bill-clattering is an important mode of communication at the nest. Their nests can be large and may be reused for many years. Many species are migratory. Painted stork, சங்குவளை நாரை (அ) மஞ்சள் மூக்கு நாரை Asian openbill, நத்தைக்குத்தி நாரை Black stork, கரு நாரை Woolly-necked stork, வெண்கழுத்து நாரை White stork, செங்கால் நாரை Black-necked stork Lesser adjutant, சிறிய போதா நாரை (A) Greater adjutant (A) Frigatebirds Order: SuliformesFamily: Fregatidae Frigatebirds are large seabirds usually found over tropical oceans. They are large, black-and-white or completely black, with long wings and deeply forked tails. The males have coloured inflatable throat pouches. They do not swim or walk and cannot take off from a flat surface. Having the largest wingspan-to-body-weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week. Christmas frigatebird, Fregata andrewsi (A) Great frigatebird, Fregata minor (A) Lesser frigatebird, Fregata ariel Anhingas and darters Order: SuliformesFamily: Anhingidae Anhingas or darters are often called "snake-birds" because of their long thin neck, which gives a snake-like appearance when they swim with their bodies submerged. The males have black and dark-brown plumage, an erectile crest on the nape and a larger bill than the female. The females have much paler plumage especially on the neck and underparts. The darters have completely webbed feet and their legs are short and set far back on the body. Their plumage is somewhat permeable, like that of cormorants, and they spread their wings to dry after diving. Oriental darter, பாம்புத்தாரா Cormorants and shags Order: SuliformesFamily: Phalacrocoracidae Phalacrocoracidae is a family of medium to large coastal, fish-eating seabirds that includes cormorants and shags. Plumage colouration varies, with the majority having mainly dark plumage, some species being black-and-white and a few being colourful. Little cormorant, சிறிய நீர்க்காகம் Indian cormorant, இந்திய நீர்க்காகம் Great