Abstract: The Crested Ibis is one of the famous endangered birds in the world.It once distrlbuted in countries,including China,Japan,Russia and Korea in Eastern Asia.But now it only survives in specific area in Yang-county,Shaanxi province China.This paper reported its field breeding information.The bird is resident in Yang-county.In Febuary it returns the nest area and copulation,nest-building,egg-laying were found from the middle of March to the beginning of April.And there are always 3 eggs in a clutch (1-4 eggs).The incubation period lasts about one month,and the feeding period is 45-50 days.The female and the male share in the nest building,incubation and feeding nestlings.Up to now,3 nests exist in Yang-county and each nest has a pair of adult.They raise young every year.