This article lists the birds found in the Indian state of Tamil Nadu. 583 species of birds have been spotted in Tamil Nadu. The list also sometimes includes the local Tamil name in italics following the English common name. This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of the IOC World Bird List, version 11.2. This list also uses British English throughout. Any bird names or other wording follows that convention. The following tags have been used to highlight several categories. The commonly occurring native species do not fit within any of these categories. (A) Accidental - Also known as a rarity, it refers to a species that rarely or accidentally occurs in Tamil Nadu - typically less than ten confirmed records. (I) Introduced - a species introduced to Tamil Nadu as a consequence, direct or indirect, of human actions. Ducks, geese, and swans Order: AnseriformesFamily: Anatidae Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, flattened bills, and feathers that are excellent at shedding water due to an oily coating. Fulvous whistling duck, பெரிய சீழ்கை சிறகி (A) Lesser whistling duck, சிறிய சீழ்கை சிறகி Bar-headed goose, பட்டைத்தலை வாத்து Greylag goose Knob-billed duck, செண்டு வாத்து Ruddy shelduck, கருடதாரா (A) Cotton pygmy goose, அல்லிச் சிறகி Garganey, வெண்புருவ வாத்து (அ) நீலச்சிறகி Northern shoveler, ஆண்டி வாத்து Gadwall, கருவால் வாத்து (A) Falcated duck Eurasian wigeon, நாமத்தலை வாத்து Indian spot-billed duck, புள்ளி-மூக்கு வாத்து Northern pintail, ஊசிவால் வாத்து Eurasian teal, கிளுவை Pink-headed duck இளஞ்சிவப்பு தலை வாத்து Red-crested pochard Common pochard Ferruginous duck, வெள்ளைக்கண் களியன் Tufted duck, குறுங்களியன் Pheasants and allies Order: GalliformesFamily: Phasianidae The Phasianidae are a family of terrestrial birds. In general, they are plump (although they vary in size) and have broad, relatively short wings. Painted francolin, வர்ண கௌதாகௌதாரி Grey francolin, கௌதாரி Common quail காகாடை Rain quail, கருங்காடை King quail Jungle bush quail, புதர் காகாடை Rock bush quail, மலைக்காடை Painted bush quail, வர்ண காகாடை Red spurfowl, சுண்டங் கோழி Painted spurfowl, varna sundan kozhi Grey junglefowl, காட்டு கோழி Indian peafowl, நீல மயில் Frogmouths Order: CaprimulgiformesFamily: Podargidae The frogmouths are a group of nocturnal birds related to the nightjars. They are named for their large flattened hooked bill and huge frog-like gape, which they use to take insects. Sri Lanka frogmouth Nightjars Order: CaprimulgiformesFamily: Caprimulgidae Nightjars are medium-sized nocturnal