 The plumage colouration mentioned is similar to that of the related African sacred ibis and straw @-@ necked ibis , which are also mainly white and glossy black . In the reproductive season , the ornamental feathers on the back and wing tips of the African sacred ibis look similar to the feathers of an ostrich , which echoes Dubois ' description . Likewise , a subfossil lower jaw found in 1994 showed that the bill of the Réunion ibis was relatively short and straight for an ibis , which corresponds with Dubois ' <unk> comparison . Cheke and Hume have suggested that the French word ( <unk> ) from Dubois ' original description , usually translated to " <unk> " , could also mean <unk> , another bird with a long , straight , but slightly more robust , bill . They have also pointed out that the last sentence is <unk> , and actually means the bird could be caught by running after it . The bright colouration of the plumage mentioned by some authors may refer to <unk> , as seen in the straw @-@ necked ibis . 
