sentences:  Meanwhile, the juvenile’s inner primaries are much paler creamy-buff hue than their other flight feathers.The dusky brown wing linings of the juvenile plumage, when compared to the darker ones of adults, show more extensive coarse patterning.Some birds by 2nd to 3rd year are so worn in their flight feathers as to appear almost unstreaked sandy while, from the 3rd year on, darker feathers start to appear below with various untidy variations.