大鸨（拼音：dà bǎo；注音：ㄉㄚˋ　ㄅㄠˇ），学名Otis tarda，属于鹤形目鸨科。

栖息于草原和半荒漠环境。在农耕地越冬。

The great bustard (Otis tarda) is a bird in the bustard family, the only member of the genus Otis. It breeds in open grassland and farmland in southern and central Europe, and across temperate Asia. European populations are mainly resident, but Asian birds move further south in winter. Portugal and Spain now contain about 60% of the world's population. It has been extinct in Great Britain since the last bird was shot in 1832. Recent attempts to reintroduce it into the UK have met with limited success. It is classified by the IUCN as "vulnerable".