Parvati Arga Bird Sanctuary Bar-headed goose "(Anser indicus)", Little grebe "(Tachybaptus ruficollis)", Eurasian wigeon "(Mareca penelope)", Mallard "(Anas platyrhynchos)", Red-crested pochard "(Netta rufina)", Tufted duck "(Aythya fuligula)," Knob-billed duck "(Sarkidiornis melanotos)", Ruddy shelduck "(Tadorna ferruginea)", Cotton pygmy-goose "(Nettapus coromandelianus)," Little cormorant "(Microcarbo niger)", Great cormorant "(Phalacrocorax carbo)," Common moorhen "(Gallinula chloropus)," Cattle egret "(Bubulcus ibis)", Intermediate egret "(Ardea intermedia)", Asian openbill "(Anastomus oscitans)", and Grey-headed swamphen "(Porphyrio poliocephalus)". Parvati Arga was declared a bird sanctuary on 23 May 1990. Prior to that it was under the fisheries department. Parvati Arga Bird Sanctuary Parvati Arga Bird Sanctuary is a bird sanctuary in Gonda district of
Bird vocalization and prevent an energetically costly fight . In birds with song repertoires, individuals may share the same song type and use these song types for more complex communication. Some birds will respond to a shared song type with a song-type match (i.e. with the same song type). This may be an aggressive signal, however results are mixed. Birds may also interact using repertoire-matches, wherein a bird responds with a song type that is in its rival's repertoire but is not the song that it is currently singing. This may be a less aggressive act than song-type matching. Communication through bird