T.W. Arnold R.M. Barta K.F. Higgins 1984 Breeding passerine birds were studied in three native grass plantings of predominantly western wheatgrass (Agropyron smithii) and green needlegrass (Stipa viridula) in south-central North Dakota during 1982-1984. A total of eight different species of passerines readily colonized this relatively new type of wildlife habitat during the second, third. and fourth growing seasons. application/pdf en Breeding bird community colonization of sown stands of native grasses in North Dakota article