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American Ornithologists' Union. 1957. Check-list of North American birds. Fifth
     edition. Am. Ornithol. Union, Baltimore.  691 pp.

American Ornithologists' Union. 1973. Thirty-second supplement to the American 
     Ornithologists' Union check-list of North American birds. 
     Auk 90(2):411-419.
    
American Ornithologists' Union. 1976. Thirty-third supplement to the American 
     Ornithologists' Union check-list of North American birds.  Auk 
     93(4):875-879.
    
Anonymous. 1939. Spread of the starling in Wisconsin. Passenger Pigeon 
     1(10):139-141, 143.
    
Arbib, R. 1978. The blue list for 1979. Am. Birds 32(6):1106-1113.
    
Barger, N. R. 1942. January field notes. Passenger Pigeon 4(1):18.
    
Bauers, H. A. 1964. Autumn season. Passenger Pigeon 26(3):143-155.
    
Beimborn, D. 1969. Bird species and the tension zone. Passenger Pigeon 
     32(2):49-51.
    
Bent, A. C. 1953. Life histories of North American wood warblers. U.S. 
     Natl. Mus. Bu11. 203. 734 pp.
    
Bernard, R. F. 1967. The birds of Douglas County, Wisconsin. Passenger 
     Pigeon 29(2):3-36.
    
Bernard, R., and B. Klugow. 1963. Hawk owls invade Wisconsin. Passenger 
     Pigeon 25(2):47-50.
    
Besadny, C. D. 1953. Late spring and summer season. Passenger Pigeon 
     15(4):174-181.
    
Binder, E. 1979. Rufous hummingbird at Hastings. Loon 51(1):14.
    
Bratlie, B. 1976. Acadian flycatcher sighting and winter wren nesting at 
     Franconia. Loon 48(4):187-188.
    
Britton, N. L., and A. Brown. 1913. An illustrated flora of the northern 
     United States and Canada. Charles Scribner and Sons Inc., New York. 
     3 vols.
    
Bystrak, D. 1979. The breeding bird survey. Sialia 1:74-79, 87.
    
Caldwell, H. 1968. Summer tanager observation. Passenger Pigeon 30(3):126.
    
Chambers, A. 1944. Minnesota nesting records, 1943. Flicker 16(l):l0-l4.
    
Christenson, G., and M. R. Fuller. 1975. Food habits of two long-eared owl 
     families in east-central Minnesota. Loon 47(1):58-61.
    
Cooper, J. A., and M. A. Johnson. 1977. Wintering waterfowl in the Twin Cities. 
     Loon 49(3):121-138.
    
Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe. l979. Classification 
     of wetlands and deepwater habitats of the United States. U.S. Fish Wildl.
     Serv., Biol. Surv. Program, FWS/OBS 79/31. 103 pp.
    
Curtis, J. T. 1959. The vegetation of Wisconsin. University of Wisconsin 
     Press, Madison. 657 pp.
    
Eckert, K. R. 1971. The summer season. Loon 43(4):114-119.
    
Eckert, K. R. 1974. The winter season Dec. 1973-Feb. 1974. Loon 46(3):104-112.
    
Eckert, K. R. 1975. The summer season (June 1-July 31, 1974). Loon 47(1):25-38.
    
Eckert, K. R. 1976. The summer season (June 1-July 31, 1975). Loon 48(1):14-28.
    
Eckert, K. R. 1978. Invasion of great gray and boreal owls, winter 1977-78. 
     Loon 50(2):63-68.
    
Eckert, K. R. 1979. Western Great Lakes Region. Am. Birds 33(5):772-775.
    
Edgar, M. 1943. Tufted titmouse nesting in Minnesota. Flicker 15(3):35.
    
Ellarson, R. S. 1950. The yellow-headed blackbird in Wisconsin. Passenger 
     Pigeon 12(3):99-109.
    
Erdman, T. C. 1970. Current migrant shrike status in Wisconsin. Passenger 
     Pigeon 32(4):144-150.
    
Erickson, A. B. 1937. Birds of Hinckley. Flicker 9(1):6, 8.
    
Erickson, A. B., and R. Upson. 1938. 1938 Minnesota nesting records. 
     Flicker 10(1):4-13.
    
Evans, D. L. 1975. Fall owl migration at Duluth, Minnesota. Loon 
     47(2):56-58.
    
Evrard, J. O. 1975. Nesting great egrets in Burnett County. Passenger 
     Pigeon 37(4):151-152.
    
Evrard, J. O., E. A. Lombard, and K. H. Larsen. 1978. Response to drought by 
     a breeding population of common loons. Passenger Pigeon 40(2):418.

Faanes, C. A. 1975. A northern three-toed woodpecker in Polk County. Passenger
     Pigeon 37(3):135-136.   

Faanes, C. A. 1979. Status of the black tern in western Wisconsin. Passenger 
     Pigeon 41(3):124-128.
             
Faanes, C. A., and S. V. Goddard. 1976. The birds of Pierce and St. Croix 
     Counties, Wisconsin.  Passenger Pigeon 38(1):19-38, 38(2):57-71.
   
Feeney, W. S.  1942. The spring season. Passenger Pigeon 4(3):50-53.
   
Follen, D. G., Sr. 1979. A probable breeding record of great-gray owls in 
     Wisconsin.  Passenger Pigeon 41(2):53-57.
   
Foster, B. 1956. Autumn season. Passenger Pigeon 18(1):31-44.
   
Garber, B. 1965. Wisconsin's third green-tailed towhee. Passenger Pigeon
     27(1):12-13.
   
Glassel, R. C.  1977.  Kentucky warbler in Washington County.  Loon
     49(4):242-243. 
   
Gleason, H. A., and A. Cronquist. 1963.  Manual of vascular plants of 
     northeastern United States and adjacent Canada.  Van Nostrand Co.,
     Princeton, N.J.  810 pp.

Goddard, S. V. 1972. Comparison of breeding bird populations of the lower 
     Kinnickinnic River Valley.  Passenger Pigeon 34(3):91-95.
   
Goddard, S. V. 1975. Spring waterfowl utilization of western Wisconsin wetlands.
     Passenger Pigeon 37(1):32-44.
   
Goddard, S. V. 1976. A Baird's sparrow in Burnett County. Passenger Pigeon
     38(1):52.   

Green, J. C. 1963. Hawk owl invasion, winter 1962-63. Flicker 35(3):77-78.
   
Green, J. C. 1967. Gray jay invasion, fall 1965. Loon 39(1):22-23.
   
Green, J. C. 1969. Northern Owl invasion, winter 1968-69. Loon 41(2):36-39.
   
Green, J. C. 1979. The summer season (June 1-July 31, 1978).  Loon 51(1):28-44.
   
Green, J. C., and J. A. Baumhoffer.  1972. The 1972 summer season.  Loon 44(4):
     105-111.

Green, J. C., and R. B. Janssen. 1975. Minnesota birds. University of Minnesota
     Press, Minneapolis. 217 pp.   

Gromme, O. J. 1941. Several interesting breeding records secured. Passenger Pigeon
     3(8):71-72.   

Hamerstrom, F., and F. Hamerstrom.  1963.  Range of the red-bellied woodpecker
     in Wisconsin.  Passenger Pigeon 25(4):131-136.
   
Henderson, C. L,. 1978.  Results of an observation card survey for sandhill 
     cranes in Minnesota for 1977. Loon 50(2):112-118.
   
Herz, J. D.  1954. Minnesota nesting season-1953. Flicker 26(2):66-73.
   
Hilsenhoff, W. L. 1966. Winter season. Passenger Pigeon 28(4):154-163.
   
Hofslund, P. B. 1952.  Winter wrens nesting at Solon Springs, Wisconsin. 
     Passenger Pigeon 14(2):82.
   
Hofslund, P. B., and G. J. Niemi.  1977.  Mississippi kite 
  (Ictinia mississippiensis) sighted at Crex Meadows.  Passenger Pigeon
     39(1):204.
   
Honetschlager, D. 1963. Cinnamon teal seen near Stillwater. Flicker 35(2):66.
   
Honetschlager, D. 1974. Gyrfalcon sighting. Loon 46(2):89-90.

Honetschlager, D. A. 1965. Black-backed three-toed woodpecker in Washington
     County.  Loon 37(1):49.   

Huber, R. L.  1962. The spring season.  Flicker 34(2):50-58.
   
Huber, R. L. 1965. Catbird in late December. Loon 37(1):48.
   
Huber, R. L.  1967. The summer season. Loon 39(4):122-131.
   
Huber, R. L. 1974a. More black-headed grosbeak records.  Loon 46(3):117.
   
Huber, R. L.  1974b.  Black-backed three-toed woodpecker in Washington County.
     Loon 46(3):127.
   
Hubert, B.  1945. Prothonotary warblers. Flicker 17(4):91.
   
Hunt, R., and L. Jahn. 1958. A cinnamon teal on Crex Meadows. Passenger Pigeon
     20(4):179-180.   

Jackson, H. H. T. 1941. The summer birds of northwestern Wisconsin. Passenger
     Pigeon 3:87-90, 95-98, 103-106. 
   
Jackson, H. H. T. 1942. The summer birds of northwestern Wisconsin. Passenger
     Pigeon 4:9-12, 37-39, 91-95.
   
Jackson, H. H. T. 1943. The summer birds of northwestern Wisconsin. Passenger
     Pigeon 5:24-35.   

Jackson, N. A.  1970. Nesting red crossbills, Washington Co. Loon 42(4):144.
   
Jehl, J. R., Jr. 1968. Relationships in the Charadrii, a taxonomic study based 
     on color patterns of downy young. San Diego Soc. Nat. Hist. Mem. No. 3.
     54 pp.
   
Johnson, J. 1976. Distribution of sandhill crane in Minnesota. Proc. Int. Crane
     Workshop 1:59-68.
   
Kemper, C. A.  1961. Autumn season. Passenger Pigeon 23(2):66-74.
   
Kemper, C. A.  1965. Autumn season. Passenger Pigeon 27(3):120-127.
   
Kemper, C. A.  1973. Birds of Chippewa, Eau Claire, and neighboring counties. 
     Passenger Pigeon 35(2):55-91, 35(3):107-129.
   
King, F. H. 1949. The American egret in Wisconsin. Passenger Pigeon 11(1):3-17.
   
Knudson, G. J.  1978. Letter to the editor. Passenger Pigeon 40(4):519.
   
Kratz, T. K., and G. L. Jensen. 1977. An ecological geographic division of 
     Minnesota.  Minnesota Department of Natural Resources, St. Paul. 24 pp. 
     (mimeo)
   
Kumlien, L., and N. Hollister. 1951. The birds of Wisconsin. Wisconsin Society 
     for Ornithology, Madison. 122 pp.
   
Larson, N. 1970. Crossbills and siskins in Chisago County. Loon 42(4):144.
   
Les, B. L. 1979. The vanishing wild. Wisconsin Department of Natural Resources,
     Madison. 35 pp.
   
Lesher, F.  1976. The autumn season. Passenger Pigeon 38(3):112-125.
   
Lien, B., and H. Lien, compilers. 1977. Afton, Minnesota. Am. Birds 31(4):703.
   
Lindholm, G. F., J.O. Helgesen, W. L. Broussard, and D. F. Farrell. 1974. Water 
     resources of the lower St. Croix River watershed, east-central Minnesota.
     U. S. Geol. Surv., Hydrologic Invest. Atlas HA-490.
   
Link, M. 1977. A natural and social history of Pine and Chisago Counties. 
     Northwoods Audubon Center, Sandstone. 36 pp.
   
Litkey, B.  1969. Groove-billed ani record for Washington County. Loon 41(2):54.
   
Longley, W. H. 1947. Sabine's gull in Minnesota. Auk 64(1):146-147.
   
Longley, W. H. 1949. Common loons breeding near Saint Paul. Flicker 21(3):89.
   
Longley, W. H. 1967. A varied thrush in Chisago County. Loon 39(2):68-69.
   
Longley, W. H. 1973a. A Townsend's solitaire in Chisago County. Loon 45(2):66.
   
Longley, W. H. 1973b. The Louisiana waterthrush still nests in Chisago County. 
     Loon 45(3):95.
   
Lound, M., and R. Lound. 1956a. Spring season. Passenger Pigeon 18(3):124-140.
   
Lound, M., and R. Lound. 1956b. Summer season. Passenger Pigeon 18(4):175-184.
   
Lound, M., and R. Lound. 1957a. The 1956 Christmas Bird Count. Passenger Pigeon
     19(1):16-24.

Lound, M., and R. Lound. 1957b. The winter season. Passenger Pigeon 19(2):84-93.

Lound, M., and R. Lound. 1957c. Spring season. Passenger Pigeon 19(3):125-141.

Lound, M., and R. Lound. 1957d. Summer season. Passenger Pigeon 19(4):174-181.

Lound, M., and R. Lound. 1958a. Autumn season. Passenger Pigeon 20(1):29-45.
   
Lound, M., and R. Lound. 1958b. Winter season. Passenger Pigeon 20(2):80-89.
   
Ludwig, F.  1974. Minnesota's third gray-crowned rosy finch. Loon 46(2):82.
   
Lupient, M. 1945. Minnesota nesting records, 1945. Flicker 17(4):82-88.
   
Lupient, M. 1952. Seasonal report. Flicker 24(4):119-121.
   
MacBriar, W. N., Jr. 1958. Spring season. Passenger Pigeon 20(3):121-136.
   
Marschner, F. J. 1930. Presettlement vegetation types in Minnesota (map). U.S.
     Department of Agriculture, Washington, D.C.
   
Martin, L. 1932. The physical geography of Wisconsin. Wis. Geol. Nat. Hist. Surv.
     Bull. 36.   

Maurer, E. D. 1969. Worm-eating warbler seen. Loon 41(3):89-90.
   
Maurer, R. 1970. Gnatcatchers in Washington County. Loon 42(4):145.
   
McCabe, R. A., and A. S. Hawkins. 1946. The Hungarian partridge in Wisconsin. Am.
     Midl. Nat.36(1):1-75.
   
Mettler, B. J. 1977. Factors contributing to the increase of the gray partridge in
     Minnesota. Loon 49(4):205-210.
   
Mierow, D.  1949. Minnesota nesting records, 1949. Flicker 21(4):101-114.
   
Moe, J. L. 1968. Winter distribution of red-headed woodpeckers in Wisconsin. 
     Passenger Pigeon 30(2):72-74.
   
Monroe, B. L., Jr. 1978. Summary of highest counts of individuals in Canada 
     and the U.S. Am. Birds 32(4):924-930.
 
Moyle, J. B. 1980. The uncommon ones: Minnesota's rare and endangered species.
     Minnesota Department of Natural Resources, St. Paul. 20 pp.
   
Olyphant, J. C. 1972. A Carolina wren's visit to Washington County. Loon
     44(3):89-90.   

Olyphant, J. C. 1973. Brewster's warbler banded in Washington County. Loon
     45(3):99-100.   

Olyphant, M. 1962. Hooded warbler banded in Washington County. Flicker 
     34(4):130.
   
Partch, M. 1970. Prairle chicken exodus: notes on the prairie chicken in 
     central Minnesota. Loon 42(1):5-19.
   
Peterson, A. J. 1951. The red-bellied woodpecker in Wisconsin. Passenger Pigeon
     13(1):51-54.
   
Peterson, L. R. 1978. Evaluation of waterfowl production units in Wisconsin. 
     Wisconsin Dep. Nat. Resour., Job Prog. Rep. W-141-R-13. 31 pp.
   
Robbins, C. S., and W. T. Van Velzen. 1967. The breeding bird survey, 1966. 
     U.S. Fish Wildl. Serv., Spec. Sci. Rep.-Wildl. 102.
   
Robbins, S. D. 1948a. The autumn season. Passenger Pigeon 10(1):33-39.
   
Robbins, S. D. 1948b. The winter season. Passenger Pigeon 10(2):79-84.
   
Robbins, S. D. 1948c. The spring season. Passenger Pigeon 10(3):116-123.
   
Robbins, S. D. 1949. The fall and early winter season. Passenger Pigeon 
     11(2):80-91.
   
Robbins, S. D. 1950a. The early spring season. Passenger Pigeon 12(3):136-143.
   
Robbins, S. D. 1950b. The late spring and summer season. Passenger Pigeon
     12(4):171-183.   

Robbins, S. D. 1961. Shorebirds in St. Croix County. Passenger Pigeon 23(2):63-64.
   
Robbins, S. D. 1963. The 1962 summer bird count. Passenger Pigeon 25(3):91-102.
   
Robbins, S. D. 1968. Shorebirds deluxe. Passenger Pigeon 30(1):31-32.
   
Robbins, S. D. 1969a. Eared grebe nests in Wisconsin. Passenger Pigeon 31(2):252.
   
Robbins, S. D. 1969b. New light on the LeConte's sparrow. Passenger Pigeon
     31(3):267-274.   

Robbins, S. D. 1973. New light on the Cape May warbler. Passenger Pigeon
     35(4):159-161.   

Robbins, S. D. 1974a. New light on the Connecticut warbler. Passenger Pigeon
     36(3):110-115.   

Robbins, S. D. 1974b. The willow and alder flycatchers in Wisconsin: a 
     preliminary description of summer range. Passenger Pigeon 36(4):147-152.
   
Robbins, S. D. 1977. The breeding bird survey in Wisconsin, 1966-1975. Passenger
     Pigeon 39(2):225-247.
   
Roberts, H., and N. Roberts. 1972. Summer season. Passenger Pigeon 34(2):74-81.
   
Roberts, T. S. 1932. The birds of Minnesota. University of Minnesota Press, 
     Minneapolis. 2 vols.
   
Roberts, T. S. 1938. Logbook of Minnesota birdlife. 1917-1937. University of 
     Minnesota Press, Minneapolis. 355 pp.
   
Russell, R. P., Jr. 1969.  The summer season. Loon 41(2):105-119.
   
Russell, R. P., Jr. 1970.  The summer season. Loon 42(2):129-135.
   
Savaloja, T. 1974. The spring season-March 1 to May 31, 1974.  Loon 
     46(4):143-l60.
   
Savaloja, T. 1977. The spring season-March 1 to May 31, 1977.  Loon 49:211-227.
   
Schorger, A. W. 1943. The prairie chicken and sharp-tailed grouse in early 
     Wisconsn.  Trans. Wis. Acad. Sci. Arts Lett. 35:1-59.
   
Schorger, A. W. 1954. The white pelican in early Wisconsin.  Passenger Pigeon
     16(4):136-140.
   
Schorger, A. W. 1955. The passenger pigeon: its natural history and extinction. 
     University of Wisconsin Press, Madison. 424 pp.
   
Scott, W. E. 1943a. Townsend's solitaire reported at Hudson, Wisconsin. Passenger
     Pigeon 4(1):3.
   
Scott, W. E. 1943b. The Canada spruce grouse in Wisconsin. Passenger Pigeon
     5(3):61-72.   

Shaw, S. P., and C. G. Fredine. 1956. Wetlands of the United States: their 
     extent and their value to waterfowl and other wildlife. U.S. Fish Wildl. 
     Serv., Circ. 39. 67 pp.
   
Simmons, O. T. 1949.  Another varied thrush visits Wisconsin.  Passenger Pigeon
     11(4):131-132. 
   
Sindelar, C. 1971.  Wisconsin osprey survey.  Passenger Pigeon 33(2):79-88.

Soulen, T. K. 1965. Spring season. Passenger Pigeon 27(1):24-47.
   
Southern, W. E. 1962.  New breeding locality for LeConte's sparrow. Passenger
     Pigeon 22(1):28-29.
   
Sparkes, V. 1953. Minnesota nesting season-1952. Flicker 25(1):10-23.
   
Stewart, R. E. 1975. Breeding birds of North Dakota. Tri-College Center for 
     Environmental Studies, Fargo, N.D. 295 pp.
   
Stone, N. R. 1957. A Baird's sparrow at Crex Meadows. Passenger Pigeon
     19(3):124-125.

Stone, N. R. 1959a. Snowy egret at Crex Meadows. Passenger Pigeon 21(4):147.
   
Stone, N. R. 1959b. Three ivory gulls at Crex Meadows. Passenger Pigeon 21(4):149.
   
Stone, N. R. 1967. Another straggler from the west. Passenger Pigeon 29(1):32-33.
   
Strelitzer, C. L. 1952. The spring season. Passenger Pigeon 14(4):113-121.
   
Surber, T. 1919. The Pine County game refuge as a playground. Fins, Feathers and
     Fur 18:1-4.
   
Tessen D. D. 1969. The autumn season. Passenger Pigeon 31(4):285-301.
   
Tessen D. D. 1977. Western Great Lakes Region. Am. Birds 31(5):1142-1146.
   
Tessen, D. D. 1978. Yellow rails and sharp-tailed sparrows at Crex Meadows. 
     Passenger Pigeon 40(1):385-386.
   
Tessen, D. D.  1979a. Parasitic jaeger. Passenger Pigeon 41(1):47-48.
   
Tessen, D. D. 1979b. Western Great Lakes Region. Am. Birds 33(5):864-866.
   
Thiel, R. P. 1978. The distribution of the three-toed woodpeckers in Wisconsin. 
     Passenger Pigeon 40(4):477-488.
   
Turner, R. E. 1979. White pelicans migrating up the St. Croix River. Loon 51(3):101.
   
Warner, D. W. 1951. The nesting season-1950. Flicker 23(1):1-8.
   
Waters, T. F. 1977. The streams and rivers of Minnesota. University of Minnesota
     Press, Minneapolis. 373 pp.
   
Willard, J. L. 1971. Possible summer mockingbird in Washington County. Loon
     43(1):24.
   
Williams, R. J. 1957. The great blue heron colonies of Wisconsin. Passenger Pigeon
     19(2):51-66.
   
Winkler, H. A.  1959. Winter season. Passenger Pigeon 21(3):121-128.
   
Wojahn, B. 1977. White-eyed vireo confirmed for Minnesota. Loon 49(3):174.
   
Young, H. 1961. The downy and hairy woodpeckers in Wisconsin. Passenger Pigeon
     23(1):3-6.
   
Young, H. 1965. White-breasted and red-breasted nuthatches. Passenger Pigeon
     27(1):16-19.
   
Young, H.  1967. The tufted titmouse. Passenger Pigeon 29(2):46-49.
   
Young, H., B. Stollberg, and M. Deusing. 1941. The spread of the cardinal 
     through Wisconsin. Passenger Pigeon 3(1):1-4.
   
Young, H. L., and S. M. Hindall. 1973. Water resources of Wisconsin St. Croix
     River Basin. U.S. Geol. Surv. Hydrologic Invest. Atlas HA-451.