Douglas H. Johnson H.A. Kantrud L.D. Igl 1999 Breeding bird populations were surveyed on 128 randomly selected quarter-sections throughout North Dakota in 1967, 1992, and 1993. Population estimates and frequencies of occurrence are reported for 92 uncommon breeding bird species with statewide frequencies of less than 10%. application/pdf en Ottawa Field-Naturalists' Club Uncommon breeding birds in North Dakota: Population estimates and frequencies of occurrence article