 In 1995 , morphological study suggested the closest extant relatives of the Réunion ibis are the African sacred ibis ( T. aethiopicus ) of Africa and the straw @-@ necked ibis ( T. spinicollis ) of Australia . It has also been suggested that it was closest to the Malagasy sacred ibis ( T. bernieri ) , and therefore of ultimately African origin . 
 In 1995 , morphological study suggested the closest extant relatives of the Réunion ibis are the African sacred ibis ( T. aethiopicus ) of Africa and the straw @-@ necked ibis ( T. spinicollis ) of Australia . It <a href='been_done' title='1'><mark>has</mark></a> also been suggested that it was closest to the Malagasy sacred ibis ( T. bernieri ) , and therefore of ultimately African origin . 
In 1995 , morphological study suggested the closest extant relatives of the Réunion ibis r the African sacred ibis ( T. aethiopicus ) of Africa and da straw @-@ necked ibis ( T. spinicollis ) of Australia . It done also been suggested dat it was closest to the Malagasy sacred ibis ( T. bernieri ) , and therefore of ultimately African origin .