Seasonal Report Archive for The Loon - Warblers Occurrence
This is the 1930 to present seasonal report archive for
The Loon, journal of the Minnesota Ornithologists' Union.
The last 2 years are available to MOU members. 		Seasons
Families
Whistling-Ducks, Geese, Swans, Ducks
New World Quail
Partridge, Pheasants, Grouse, Turkeys
Grebes
Pigeons, Doves
Cuckoos
Nightjars
Swifts
Hummingbirds
Rails, Gallinules, Coots
Limpkin
Cranes
Stilts, Avocets
Plovers
Sandpipers
Jaegers
 Alcids
Gulls, Terns
Loons
Shearwaters and Petrels
Storks
Frigatebirds
Boobies and Gannets
Cormorants
Pelicans
Bitterns, Herons, Egrets, Night-Herons
Ibises
New World Vultures
Osprey
Kites, Accipiters, Hawks, Eagles
Barn Owls
Screech-Owls, Owls
 Kingfishers
Woodpeckers
Caracaras, Falcons
Flycatchers
Vireos
Shrikes
Jays, Nutcrackers, Magpies, Crows
Chickadees, Titmice
Larks
Martins, Swallows
Kinglets
Waxwings
Silky-flycatchers
Nuthatches
Creepers
Gnatcatchers
 Wrens
Thrashers, Mockingbirds
Starlings
Dippers
Thrushes
Old World Flycatchers
Old World Sparrows
Pipits
Finches
Longspurs and Snow Buntings
Towhees, Sparrows
Yellow-breasted Chat
Blackbirds, Orioles
Warblers
Tanagers, Cardinals, Grosbeaks

Seasons
Species: Warblers
Ovenbird
Worm-eating Warbler
Louisiana Waterthrush
Northern Waterthrush
Golden-winged Warbler
Blue-winged Warbler
Blue-winged Warbler
[Golden-winged Warbler X Blue-winged Warbler]
[Lawrence's Warbler]
[Brewster's Warbler]
Black-and-white Warbler
Prothonotary Warbler
 Swainson's Warbler
Tennessee Warbler
Orange-crowned Warbler
Nashville Warbler
Connecticut Warbler
MacGillivray's Warbler
Mourning Warbler
Kentucky Warbler
Common Yellowthroat
Hooded Warbler
American Redstart
Kirtland's Warbler
 Cape May Warbler
Cerulean Warbler
Northern Parula
Magnolia Warbler
Bay-breasted Warbler
Blackburnian Warbler
Yellow Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Pine Warbler
 Yellow-rumped Warbler
[Yellow-rumped Warbler (Myrtle)]
[Yellow-rumped Warbler (Audubon's)]
Yellow-throated Warbler
Prairie Warbler
Black-throated Gray Warbler
Townsend's Warbler
Hermit Warbler
Black-throated Green Warbler
Canada Warbler
Wilson's Warbler
Painted Redstart
Golden-winged Warbler(Vermivora chrysoptera)
YearSeasonNS
1934Summer A female of this species was seen carrying food by Prosser near Lim1ood on June 28th. No nests were found. ·
1962SpringMay 12 Goodhue Co., A. C. Rosenwinkel; May 13 Hennepin Co., W. R. Pieper and R. Huber; May 20 Washington Co., Dean Honetschlager.
1963SpringMay 4, Vasa, Goodhue Co., Avifaunal Club; May 11, Ramsey Co., A. C. Rosenwinkel; May 12, Washington Co., D. Honetschlager; May 25, Cass Co., the Mathisens.
1963FallAug. 11, Anoka Co., D. Pearson; Aug. 30, Washington Co., Jane Olyphant; Sept. 13, Hen· nepin Co., Rachel Tryon.
1964Spring5-3 Hennepin Oo, RBJ; 5-6 Hennepin Co, MAS; 5-10 Goodhue Co, IG; 5-23 Crow Wing Co, TEM; 5-11 Frontenac, JPF; 5-17 Aitkin Co, DM.
1964Summer6·5, Canyon, St. Louis Co, JCG; 6-24, Zim, St. Louis Co, JCG; 8-16, Crow Wing Co, TEM; 8-21, Crow Wing Co, MSB.
1964Fall9-2 Crow Wing Co, TEM.
1965Springreported by 17 observers over most of the state, which must tie in with the high incidence of hybrids reported; Winona Co, 5-16, KK; Rochester, 5-17, JPF; Rice Co, 5-11, JB, PE, CE; Goodhue Co, 5-11, DB; Washington Co, 5-14, WWL; Hennepin Co, 5-5 to 5-19, MHM, RDT, JRR, TEM, FN, FL, WJB; Sherburne Co, 6-2, RPR and Kim Eckert; Stearns Co, 5-9, 10 birds, NH; Crow Wing Co, 5-29, MSB; Hibbing, 5/8( HM) and 5-23(JCG). Note that the records are scattered over ten different counties.
1965Fall9-8 Belle Prairie, LSR; 9-9 Minneapolis, FN and 9-19 Crow Wing Co, MSB.
1966Spring5-7 Vasa, BL; 5-8 Frontenac, GD, GG, FV; 5-8 Wabasha, DGM; 5-14 St. Cloud, RPR and Dakota Co, MIG; 5-15 Minneapolis, RBJ; 5-17 Rochester, JPF and Morrison Co, LSR; 5-20 Minneapolis, EHH and Carlos Avery Refuge, WHL; 5-21 Dakota Co, MRL; 5-22 Goodhue Co, EMB; 5-28 St. Louis Co, DB.
1966Summernested in Crow Wing Co; also reported from Hubbard, Carlton, Clearwater and Becker Co's.
1966Fall9-3 Anoka Co., BL; 9-11 Crow Wing Co., MSB; 9-16 Anoka Co., WHL.
1967Springearly 5-10 Olmsted Co., CMJ, JPF; 5-14 Winona Co., FGD and Rice Co., OAR; 5-16 Hennepin Co., FN/ MAS.
1967Summerreported from Clearwater, Aitkin Co's.
1967Fall latest 9-12 Morrison Co., LSR; 9-16 Lyon Co., BL and Hennepin Co., RDT.
1968Spring early 5-11 Hennepin Co., JAJ, EHH; 5-12 Goodhue Co., EMB; 5-14 Minneapolis, FN/ MAS, DB; westerly record, 5-21 Mt. Lake, Cottonwood Co., LAF; two northerly records, 5-30 Clearwater Co., KE; 6-2 Red Lake Reservation, Beltrami Co., JAM.
1968Summer nested in Mille Lacs, Hubbard Co's; also reported from Clearwater, Pine, Crow Wing, Carlton Co's. Winona Co.
1968Fall8-26 Morrison LSR; 9-1 Hennepin FN/ MAS.
1969Spring5-5 Sibley Co., BL; 5-6 Minneapolis, DB, FNI MAS; 5-13 Hennepin Co., EIS; 5-16 Morrison Co., LSR, and Mille Lacs Co., MI; 5-18 Beltrami Co., JAM; 5-21 Washington Co., EC.
1969Summer6-14 Pine Co. DB; 6-28 Rts. 2+31, St. Louis Co., 2, VL; 7-17 Crow Wing Co., 2 juv.; 8-2 Mille Lacs BAH.
1969Fall8-1 Mille Lacs BAH; 9-6 Wright BAH; 9-13 Hennepin DB; 9-24 Mille Lacs MI. Brewster's Warbler: 8-31; 9-4 Hennepin VL.
1970Springearly south 5-7 Hennepin RG and Dakota DB; 5-9 Wright BH and Isanti CU; peak 5-12 Goodhue (10) KE; early north 5-9 Crow Wing J B; 5-11 Morrison LR.
1970Summernested in Mille Lacs Co.; reported from Becker, Crow Wing, Washington (7-5, EC), and St. Louis Co. Gnesen Twp. 1, seen· and 2 heard at 3 different localities, MMC).
1970Fall4 reports EC; 8-31 Washington WL; 9-2 Wright ES; 9-3 Morrison L R.
1971Springearly south 5-10 Henne pin VL; 5-12 Hennepin ES; 5-14 Goodhue BDC~ v':fferr'ifcots north 5-27 Duluth MMC; 5-29 Clear:
1971Summernested in Mille Lacs; also reported from St. Louis, Crow Wing, Aitkin, Sherburne, Chisago, Clearwater and Washington.
1971Falllate south 9-10 Wright; 9-24 Ramsey; 9-25 Hennepin; late north 9-6 Mille Lacs; 9-8 Duluth; peak 8-21 Crow Wing (25) TS.
1972Summernested in (Crow Wing) (Aitkin). (Mille Lacs); seen in Cass, Clearwater' Itasca (7·15 Big Fork DB), Chisago, Washington (EC).
1973SpringSOLDD-VU•GI:D WARBL£1'11 16 l'tEPORTI:RS REP'ORTINCio &AI'tl.Y IOUTII 1·•9  GOODHUE: Vl.l 5-13 HDfN£PiN SCJ 6-16 NICOLLEt GJJIII I.ARLY NOII.TH s-a•  ITASCA OBI S-23 CLI:AIWATER RCDJ 6~82 ITASCA Mlo  
1973Fall Seen in Aitkin, St. Louis, Morrison, Sherburne.
1974Spring Early south 5-4 Henepin WKE; 5-10 Hennepin PCHS; 5-10 Olmsted JF; early north 5-18 Clearwater MS; 5-19 Pine JG, ML; 3 reports 5-21. Biue-winged Warbler 8 reports: 5-11 Olmsted (6) JF; 5-18 Winona (3) DS; 5-16 Hennepin (1) BDC; 5-20 Hennepin PCHS; 5-20 Fillmore (6) JF; 5-22 Hennepin (1) OJ; 5-25 Houston (2) FL; 5-26 Goodhue (1) ETS.
1974Summer Reported from Clearwater, Itasca, Crow Wing, St. Louis, Kanabec, Morrison, Chisago, Washington.
1974Fall 8-21 Marshall AR; 9-5 Morrison LSR; late south 9-8 Hennepin VL, Anoka GC.
1975Spring Early south 5-2 Hennepin JJW, EPRD; 5-6 Rice RDi; 5-7 Hennepin RAG; early north 5-9 Morrison LSR; evidence that this bird is expanding its range northward: 5-26 Koochiching PG.
1975Summer Reported from Cass, Aitkin, Itasca, St. Louis (including Babbitt; P. Doran, J. Johns) and S'l\erburne. Blue-winged. Warbler Nested in Houston; also reported from Goodhue and Wabasha.
1975Fall9-4 Cass EM (only report north); late south 8-30 Washington GC, 8-26 Isanti RJ; 9-1 Cottonwood LF.
1976Spring Early south 5-11 Hennepin BDC and Jackson ED; 3 reports on 5-12; early north 5-13, 5-21 St. Louis GN; 5-15 Crow Wing JB; Otter Tail (5-29, expansion) GW.
1976Summerreported from Cass, Crow Wing and St. Louis (7-9 Duluth, DA; 6-2 Babbitt, PD; Ely, GN).
1976Fall Late north 8-23 Morrison, 8-28 Dulluth; late south 9-24 Hennepin.
1977Spring Early south 5-5 Blue Earth VR and Hennepin OJ; 5-6 Goodhue DB and Hennepin ES; 5-8 Mower RK; early north 5-8 Crow Wing JB; 5-9 Crow Wing TS; 5-11 St. Louis HPD.
1977Summer Nested in Clearwater and Anoka; also reported from Cass, Itasca, Crow Wing, Mille Lacs, Otter Tail (6-2, GW) and St. Louis (Duluth, DA; Babbitt, LP, T. Hargy).
1978SpringEarly north 4-22 Morrison PM.
1978Summer Breeding reported from Anoka; seen also in Hennepin, Washington, Becker (Tamarac NWR), Clearwater, Hubbard, Beltrami (Waskish), Cass, American Crow Wing, Aitkin, St. Louis (Brimson, Babbitt) and Lake (Finland, DGW).
1978Fall Late north 9-2 Becker GO; late south 9-14 Houston EMF.
1979Spring Early south 5-7 Anoka JLH; early north 5-19 Becker SM.
1979Summer Breeding reported from Anoka (JLH); also seen in Otter Tail (Maplewood SP), Becker (Tamarack NWR), Clearwater, Beltrami (Waskish), Itasca (Big Fork), Crow Wing, St. Louis (Duluth Twp., Alden, Elmer, Lavell).
1979Fall Late north 9-8 Aitkin RJ,, 9-14 St. Louis DA; late south 9-13 Hennepin DB, Washington DMB.
1980Spring Early south 5-9 Anoka JLH, 5-10 Dakota DGW, Washington DMB; early north 4-30 Otter Tail GMO, 5-14 St. Louis DA. Blue-winged Wa1rbler Early south 5-4 Dakota JD, 5-8 Ramsey DGW; also reported from Fillmore, Goodhue, Houston, Nobles, Olmsted and Winona counties.
1980Summer Breeding reported from Anoka; seen in Chisago, Pine, Carlton, St. Louis (Duluth), Aitkin, Crow Wing, Wadena, Otter Tail, Hubbard, Itasca, Clearwater, Lake of the Woods (3, Lude BBS; power line SE corner).
1980Fall Late north 8-29 Itasca TL, 9-2 Aitkin WN; late south 9-10 Anoka JLH, 9-19 Hennepin SC.
1981Spring Early south 5-2 Hennepin RR, 5-3 Hennepin DB, 5-5 Hennepin PF; early north 5-9 Aitkin JB, JG, 5-10 Crow Wing JB, 5-16 Mahnomen KE. Blue-wnged Warbler Early south 5-3 Houston JPIAM, 5-4 Hennepin VL, 5-5 Mower RRK.
1981Summer Seen in 11 counties within range.
1981Fall Four reports: 8-22 Aitkin WN, 8-30 Pine RJ, 9-1 Houston EMF, 9-7 Houston EMF.
1982Spring Early south 5-7 Goodhue DB, 5-9 Blue Earth JCF, Goodhue DGW, Hennepin SDM, Le Sueur EK, Olmsted JEB, 5-11 Dakota JD; early north 5-10 Crow Wing JB, Mille Lacs CF / KB, 5-11 Crow Wing TS, 5-15 Beltrami AS.
1982Summer Breeding data from Hubbard. Seen also in II other counties throughout range plus Anoka (Cedar Creek NHA), Koochiching (Koochiching SF; JCR).
1982Fall Late north 9/11 St. Louis KE, LE, 9/15 Crow Wing JB; late south 9/17 Hennepin SC, Houston EMF, 9/27 Olmsted JEB.
1983Spring Early south 5/7 Mower RRK, 5/10 Hennepin ES, 5/11 Hennepin AB; early north 5/11 Crow Wing JB, 5/12 Mille Lacs MLWMA, 5/18 Becker TNWR.
1983Summer Breeding data from Clearwater, Mille Lacs. Also seen in Dakota ("Brewster's", Lebanon Hills, DZ & MAC), Washington, Anoka, Aitkin, Crow Wing, Beltrami, Itasca, St. Louis, Lake (7/4 Baptism River SP, KRE), COOK (7/1, T60N, R4W, Sawhill Trail, JCG).
1983Fall Six reports: 8/27; 9/18 Brown JSp, 9/1 Itasca DB, 9/2 Nicollet JCF, 9/3 Becker DZ/MC, 9/15 Anoka SC.
1984Spring Early south 5/8 Cottonwood WH (Brewster hybrid), 5/13 Dakota JD, Houston EMF, Goodhue ES, 5/16 Dakota AB, Hennepin SC, Goodhue PL; early north 5/13 Aitkin WN, 51!6 Marshall J. Mattson, 5/17 St. Louis KC, 5/18 KE, 5/19 Clearwater DGW.
1984Summernested in Anoka; also seen in 14 other counties including Cook (6/14 -KMH) and Washington.
1984Fall Late south: Olmsted 9/9 JEB, 9/15 RE, 9/14 Houston EMF.
1985Spring Early south 5/1 Olmsted PP, 5/4 Freeborn RJ, 5/5 Hennepin DZ, 5/6 Dakota TTu, Hennepin OBI, RH; early north 5/5 St. Louis fide KE, 5/7 Otter Tail SDM, 5/11 Pine RJ, 5/12 Polk, Clearwater AB.
1985Summer Probable nesting in Kanabec. Also seen in St. Louis, Itasca, Clearwater, Wadena, Anoka. Eary migrant (?) 7/24 Houston (EMF). Fewer reports than in past several years.
1985Fall Late north 8/28 Beltrami AB, 9/8 Kanabec SSt; late south 9/1 Anoka JH, 9/1 Brown JS, 9/2 Wright ES, 9/10 Houston EMF.
1986Spring Early south 5/1 Hennepin SC, 5/4 Fillmore RS, 5/8 Renville RJ, Lyon HK, Washington SSt; early north 5/4 St. Louis D. Johnson, Aitkin WN, 5/9 Clay LCF, 5/10 Clearwater AB, St. Louis MH/JS; late south 5/18 Mower JM.
1986Summer Seen in Cook (several singing near Grand Marais, WP), St. Louis (south half), Itasca, Koochiching (6119, FS), Lake of the Woods (three, BBS), Beltrami, Clearwater, Cass, Mille Lacs, Kanabec, Anoka.
1986Fall Late north 8/16 Cass and Morrison RJ, 8/31 Clearwater AB; late south 8/30 Dakota TT, 9/1 Anoka TT, 9/22 Hennepin SC. 
1987Spring Early south 5/1 Brown JS, 5/5 Hennepin SC, 5/6 Houston EMF; early north 5/9 Duluth, P. Backstrom, 5/10 Aitkin WN, 5/13 Becker RJ.
1987Summer Seen in 15 counties north and east from Anoka, Becker, Mahnomen and Lake of the Woods, including Lake (612-16, 10 mi. west of Silver Bay, SWIMS) and Cook (6/17, same location as 1986 near Grand Marais, WP).
1987Fall Late north 8/27 Mahnomen RG, 8/30 Aitkin WN and Hubbard JL; late south 9/2 Fillmore AP, 9/6 Dodge RJ, AP, 9/11 Hennepin SC.
1988Spring Early south 5/1 Goodhue DZ, 5/2 Hennepin SC, KR, 5/3 Olmsted BSE; early north 5/8 Aitkin WN, Beltrami TK and Carlton LW, 5/12 Clay LCF and 5/15 Cook DB and Hubbard JL (Lawrence's hybrid).
1988Summer Seen in nine counties within range north to Red Lake, Clearwater, Itasca and south to Anoka, Washington; also seen in Lake (6/1323, SWIMS). Early migrant 7/23 Olmsted.
1988Fall Late north 9/3 Duluth SC; late south 9/1 Fillmore NAO, 9/15 Cottonwood BF, 9/20 Hennepin SC.
1989Spring Early south 5/6 Freeborn AP, RJ, Hennepin OJ, Washington RH and Wright AB, 5/8 Olmsted PP, 5/11 Blue Earth JCF; early north 5/17 St. Louis KE, 5/21 Aitkin WN, 5/25 Carlton GS.
1989Summer Fewer reports than usual. Nested in Anoka; also seen in Washington, Todd, Pine, Aitkin, Beltrami, St. Louis, 6/10-18 Cook WP.
1989Fall Late north 8/11 Aitkin RJ, AP, 8/1 8 Clearwater AB, 8/28 Beltrami DJ; late south 9/9 Fillmore NAO, 9/20 Hennepin SC, OP, 9/21 Houston EMF.
1990Spring Early south 5/8 Hennepin SC and Ramsey RH, 5/9 Anoka GP, 5/11 Olmsted JB, BSE, Rice TB and Scott DC; early north 5/8 St. Louis BP, 5/10 Kanabec G~ 5/12 Carlton LW.
1990Summer Probable nesting in Anoka. Seen in 11 Northern counties plus Isanti; Brewster's Warbler seen 6/1 Otter Tail SDM.
1990Fall Late north 8/8 Lake DPV, 8/12 Becker MO, 8/26 Beltrami DJ; late south 9/6 Brown JS and Sherburne DO, 9/13 Ramsey RJ, 9/16 Hennepin SC.
1991Spring Early south 5/4 Houston AB, 5/6 Brown JS, 5/7 GoodhueWP, Hennepin SC, RiceTB Winter 1991 and Winona CS, 5/8 Murray ND; early north 5/7 Becker DEB, 5/9 Grant SDM, 5/10 Clay LCF.
1991Summer Probable nesting in Clearwater, Aitkin, Washington; seen in 11 other counties within range plus migrants 6/1 Scott, (no date) Carver.
1991Fall Late north 9/2 Beltrami DJ, 9/7 Aitkin WN, 9/14 St. Louis KR; late south 9/3 Brown JS, 9/7 Dakota RB, 9/14 Hennepin SC and Murray RJ.
1992Spring Early south 5/7 Dakota JD, 5/8 Olmsted JB, BSE, Sherburne SNWR and Winona CS; early north 5/9 Becker BBe and Beltrami DJ, 5/11 St. Louis TW, 5/12 Cass RJ.
1992Summer Probable nesting in Becker, Crow Wing; seen in 13 other counties within an area bounded by a line through Roseau, Marshall, Sherburne, Washington, Lake.
1992Fall Late north 8/29 Becker MO, 9/3 Otter Tail SDM and Wilkin RG, 9/5 Clearwater AB; late south 9/7 Olmsted JB, 9/12 Cottonwood RJ, 9/17 Hennepin SC and Rice TB.
1993Spring Early south 5/5 Lac qui Parle FE, 5/6 Hennepin SC, CR/CD and Rice TB, 5/7 Winona CS. Early north 5/6 Becker BBe, 5/8 Aitkin WN, 5/9 Clay LCF and Douglas JW.
1993Summer Nested in Aitkin; probable breeding in Crow Wing and hybridization in Becker (see Blue-winged Warbler). Also seen in Beltrami, Itasca, St. Louis, Cook KMH, Cass, Kanabec, Sherburne, Chisago, Anoka, Washington; plus 6/4,10 Rice TB (migrants?).
1993Fall Late north 9/1 Clearwater AB, 9/6 Kanabec CM, 9/11 Becker MO. Late south 9/13 Anoka CF, 9/14 Brown JS and Winona CS, 10/15–19 (latest dates on record) Hennepin SC.
1994Spring Early south 4/30 Goodhue BL, 5/7 Houston MH and Olmsted JBo, JSt, 5/9 Hennepin SC, TT and Winona CS; early north 5/13 Otter Tail CS/KC and St. Louis AE, 5/15 Aitkin WN and Becker BBe.
1994Summer Probable nesting in Crow Wing; seen in 12 other counties within regular range, plus late migrant 6/1 Scott and early migrant 7/23 Winona.
1994Fall Late north 9/4 Aitkin CMG, 9/5 Carlton LW, 9/6 Kanabec CM. Late south 9/14 Brown JS and Winona CS, 8/26 Anoka JBe, 9/27 Hennepin SC.
1995Spring Early south 5/6 Winona CS, 5/8 Olmsted CK, 5/9 Hennepin SC, Nicollet MF and Rice TB; early north 5/14 Aitkin CB and Kanabec CM, 5/15 Becker BBe, 5/18 St. Louis AE.
1995Summer Probable nesting in Crow Wing, Aitkin. Seen in 11 additional northern counties as far west as Mahnomen, Otter Tail; plus Sherburne, Anoka, Washington.
1995Fall Late north 9/4 Aitkin WN, 9/8 Kanabec CM, 9/12 (ties fifth latest north) Becker (2) BBe. Late south 9/12 Chisago RG, 9/14 Hennepin TT, 9/26 (fifth latest on record) Hennepin KB.
1996Spring Early south 5/15 Hennepin SC, 5/16 Freeborn ABa and Olmsted JSt. Early reports north on 5/19 Aitkin CB, WN, and 5/20 Carlton LW.
1996Summer Nested in Becker KHu, Crow Wing. Seen in nine additional north central and northeast counties plus Morrison, Stearns, Kanabec, Pine, Anoka, Chisago, Washington.
1996Fall Late north 9/6 Todd RJ and Kanabec CM, 9/9 Aitkin CB. Late south 9/21 Brown JSp and Waseca JSe, 9/24 Winona CS.
1997Spring Early south 5/15 Scott RH and Hennepin SC, 5/16 Anoka JH. Early north 5/17 Aitkin WN, 5/20 (Brewster's hybrid) Kanabec CM, 5/22 Becker BBe and Kittson GS. Also reported 5/24 Agassiz NWR, Marshall Co. (1) MBW.
1997Summer Seen in 16 counties as far north as Marshall (The Loon 69:227), St. Louis and Lake, and as far south as Anoka and Washington counties; plus late migrant 6/2 Rice. Probable nesting in Cass, Crow Wing, Aitkin; “Brewster's” Warbler identified 7/6 Kanabec CM.
1997Fall Late north 9/1 Aitkin WN, 9/8 Kanabec CM, and 9/14 Aitkin CB. Late south 9/21 Hennepin SC, WM, and 10/4 Hennepin HT.
1998Spring Early south 5/6–7 Mower DSm, 5/9 Olmsted CK. Early north 5/13 Otter Tail SDM, Cass EP, and Aitkin CB, plus 5/15 Becker (about 20) PS.
1998Summer Reported in 15 counties as far west and south as a line through Roseau, Todd, Washington. New nesting record in Todd SDu, JSK; probable nesting in Beltrami.
1998Fall Late north 8/23 Carlton LW, 8/24 Clearwater RJ and Beltrami PBD, 8/30 Aitkin WN. Late south 9/8 Rice TBo, 9/13 Hennepin TT, 9/24 Hennepin SC.
1999Spring Arrived south and north a few days earlier than the recent median arrival dates. Early south 5/2 Goodhue ABo, 5/3 in Rice, Washington, Fillmore. Early north 5/6 Kanabec CM, 5/7 St. Louis JN. Unusual location 5/8 Lac qui Parle RJ.
1999Summer Recorded in 14 northern counties as far west as Beltrami, Becker, Todd; plus Anoka.
1999Fall Early south 8/15 Hennepin SC, TT, 8/24 Ramsey RH. Late north 8/30 Aitkin WN, 9/5 Carlton LW, 9/12 Kanabec CM (recent median 9/6). Late south 9/11 Dakota DBS, 9/12 Hennepin SC, ten days earlier than normal. DBr found a “Lawrence's” hybrid in Watonwan County on 8/25, and TT reported a “Brewster's” from T. S. Roberts Sanctuary in Hennepin County on 9/5.
2000Spring Observed in 14 south and 12 north counties, and in all regions except southwest, but only Otter Tail in the west-central. Early south 5/1 Dakota SL, 5/3 in three counties. Early north 5/6 Kanabec CM, then daily arrivals 5/7–11. Lingered through 5/30 Rice TBo. “Brewster's” hybrid reported 5/20 Nicollet (Seven Mile Creek C. P.) LF, MF.
2000Summer Reported in 13 counties as far northeast as St. Louis, and as far west and south as a line through Clearwater, Todd, Anoka.
2000Fall Early south away from breeding areas 8/16 Hennepin SLC. Peak 8/20 Anoka (total of 7 including a “Lawrence's” Warbler) KJB. Late north 9/10 Carlton LAW, 9/11 Clearwater RBJ. Late south from three counties 9/10–11, then only 10/9 Anoka fide SLC.
2001Spring Observed in 20 south and 14 north counties, and in all regions, but only Roseau in Northwest. Early south 4/30 (ties earliest) Anoka KJB and Dakota CRG, 5/1 Scott CMM, 5/4 Fillmore and Rice. Early north 4/30 Crow Wing MRN and St. Louis SPM, DKM, 5/5 Aitkin WEN and Cass WLB, 5/6 Wadena PJB. Latest south 5/28 Hennepin SLC. “Brewster's” hybrid 5/12 Anoka (Boot Lake S.N.A.) †PEB.
2001Summer Seen in nine North-central and Northeast counties plus Becker, Mille Lacs, Pine, Stearns, Sherburne, Anoka; also, new nesting record in Kanabec CAM.
2001Fall Two north reports after 9/7 median departure date: 9/13 Crow Wing PSP, 9/16 Carlton LAW. Early south 8/4 Meeker DMF, 8/17 Rice TFB. Late south reports in four counties 9/10–11, 9/13 Goodhue ADS, 9/14 Hennepin ChM.
2002Spring Seen in 28 counties in the south and 10 in the north. Early south 5/4 Dakota, Goodhue, Hennepin, Ramsey and Rice. Unusual report 5/11–12 Lac qui Parle †NSp. Early north 5/11 Otter Tail SPM, DKM, 5/14 Cass JWL and Mille Lacs JJS. “Brewster's” Warbler 5/24 Carver RMD.
2002Summer Reported in 17 counties as far west and south as a line through Beltrami, Becker, Todd, Sherburne, Anoka; new nesting record in Lake DAG.
2002Fall Early south 8/18 Hennepin ChM. Late north 9/7 Beltrami DPJ and Mahnomen JJS, 9/22 Cook RBJ. Late south 9/16 Freeborn AEB, 9/16–17 Hennepin SLC, ChM. One report of “Lawrence's Warbler” 9/1 Fillmore NBO.
2003Spring Arrived within one day of recent medians. Early south 5/4 Hennepin SLC, 5/6 Rice TFB, 5/10 in seven counties. Early north 5/8 Cass JWL, 5/14 Todd JSK, SID, 5/15 Aitkin WEN. Late south (away from known breeding areas) 5/26 Nicollet ChH. Territorial birds found at periphery of usual range 5/24 Pennington (Hickory Twp.) JMJ, PHS.
2003Summer Observed in 11 North-central and Northeast counties plus Becker, Mille Lacs, Stearns, Sherburne, Anoka; new nesting record in Pine JMP.
2003Fall Early south (away from known breeding range) 8/22 Hennepin TAT and Washington REH. All south reports from eastern regions except Lac qui Parle, Rice. Observed in seven north counties, but none later than 9/2 Mille Lacs RBJ, 9/3 St. Louis SLF (median 9/8). Late south 9/14 Hennepin DWK, 9/15 Fillmore NBO (median 9/21).
2004Spring Found in every region except the Southwest, though only Becker in the Northwest. Early south 5/6 Rice TFB, 5/7 Washington REH, then eight additional counties 5/8. Early north 5/12 Morrison BWF, Kanabec and Pine JMP. Late south 5/25 Brown JSS, Dakota JPM and Hennepin SLC, 5/27 Rice TFB. “Brewster's” Warbler observed 5/17 Ramsey NSp, 5/27 Anoka †HPe.
2004Summer Seen in 18 counties as far south as 6/1, 6/3 Rice TFB; new nesting record Sherburne PLJ.
2004Fall Early south 8/6 (second earliest south; migrant?) Sherburne PLJ, 8/21 Freeborn AEB, 8/23 Hennepin SLC, TAT. Late north 8/29 Lake JWL, 8/30 Todd JSK, SID, 9/3 Mille Lacs RBJ (median 9/8). Late south 9/13 Houston FZL, 9/18 Hennepin TAT, 9/24 Hennepin SLC (median 9/20). One “Brewster's Warbler” reported 9/8 Ramsey (Maplewood N.C.).
2005Spring Found in every region but the Southwest. Early south 5/6 Rice TFB, 5/7 Ramsey SWe, 5/8 Brown, Goodhue, Washington. Early north 5/6 Hubbard BJU, 5/9 Carlton JWL and Marshall PHS. At Agassiz N.W.R. in Marshall, PHS found a perfectly normal-looking male repeatedly delivering the song of a Blue-winged Warbler. “Lawrence's Warbler” 5/19 Scott (Murphy-Hanrehan P.R.) RBW.
2005Summer Observed in 13 counties north and east of a line from Marshall to Anoka.
2005Fall Early south 8/6 Sherburne ASc, 8/11 Lac qui Parle BJU, then none until 8/21 Anoka, Hennepin and Rice. Late north 9/9 Cass BAW, 9/14 Mille Lacs ASc and Pine (9) JMP (median 9/8). Late south 9/24 Fillmore NBO, 10/2 Hennepin DOB (median 9/21). Single “Brewster's” Warblers 8/10 St. Louis JWB, 9/4 Crow Wing JPM.
2006Spring Found in every region, though only single reports from the Southwest and Northwest. Early south (also see undocumented reports) 5/5 Sherburne ASc, 5/6 Meeker DMF, 5/7 Dakota and Swift. Early north 5/3 Carlton LAW, 5/7 Mille Lacs ASc, 5/8 Beltrami KLa. Late south 5/21 Brown BTS and Dakota ADS, 5/23 Lac qui Parle BJU (median 5/28). A “Lawrence's Warbler” 5/26 Scott (Murphy-Hanrehan P.R.) BAF was on the same territory as last year.
2006Summer Reported from 21 counties north and east of a line from Otter Tail to Dakota. “Lawrence's” Warbler 6/10 Scott (singing male at Murphy-Hanrehan P.R.) ADS.
2006Fall Reported from 7 north and 16 south counties. Early south (away from known breeding locations) 8/12 Rice TFB, 8/18 Hennepin DWK (median 8/15). High counts 8/18 Mille Lacs (5) ASc, 8/27 Anoka (5) DWK. Late north 9/1 Beltrami PBD and Mille Lacs NSc, 9/10 Pine JMP (median 9/8). Late south 9/16 Carver REH and Scott ADB, 9/25 Dakota JLO (median 9/21).
2007Spring1819 Reported from all regions except Southwest. Early south 5/5 Goodhue SWe, Le Sueur DAB, Olmsted JWH, and Rice TFB matched the recent median. Early north 5/5 Mille Lacs ASc, 5/7 Cass BAW and Clay RHO (median 5/8). A male “Lawrence's Warbler” 5/5+ Scott (Murphy-Hanrehan P.R.) BAF defended the same territory it occupied in 2005 and 2006.
2007Summer163 Reported from all northern regions except Northwest and West-central, plus all summer in Sherburne m.ob., 6/15 Chisago AKe, 6/25 Stearns RPR.
2007Fall821 Early south away from known breeding areas (median 8/14) 8/12 Le Sueur JCC, 8/16 Olmsted JWH. High count 8/9 St. Louis (7) PHS. Late north 9/5 Todd MSK, 9/8 Cass MRN, Pine DPG (median 9/9). Late south 9/15 Hennepin HCT and Scott BAF, 9/20 Rice TFB (median 9/22). Two hybrid individuals noted: “Brewster's Warbler” 8/24 Dakota JPM and a female “Lawrence's Warbler” (probably hatch-year) 8/25 Scott (Murphy-Hanrehan P.R.) BAF.
2008Spring1929 Early south (median 5/5) 5/2 Fillmore DBz, 5/3 Rice TFB, 5/5 Hennepin CMB, DAC. Early north (median 5/8) 5/8 Cass BAW, 5/13 Crow Wing JSB, Mille Lacs ASc, 5/14 Clearwater JEB, Kanabec DPG. High count 5/16 Scott (10, Murphy-Hanrehan P.R.) BAF. “Brewster's Warbler” 5/11 Winona †ANy. “Lawrence's Warbler” reported 5/14 Scott (Murphy-Hanrehan P.R.) JBB.
2008Summer145 Found in all northern regions plus Central and East-central.
2008Fall1017 High counts 8/31 Anoka (5) DWK, 9/12 Hennepin (5) CMB. Late north 9/13 Crow Wing JSB, 9/16 Carlton LAW, 9/20 Lake MJB (median 9/9). Late south 9/14 Anoka DWK, Hennepin CRM, 9/15 Dakota JPM, 9/27 Stearns (2) MJB (median 9/22).
2009Spring1722 New county record: 5/16 Chippewa HHD. Early south (median 5/5) 5/4 Dakota JPM, 5/7 Meeker DMF, 5/8 Olmsted JWH, Rice DAB, TFB, Sherburne ASc. Early north (median 5/8) 5/11 Cass MRN, Mille Lacs ASc, Morrison RBJ, 5/13 Aitkin KCR, Cass BAW. Late south away from breeding areas 5/23 Hennepin RLR, Houston (9) AXH, 5/28 Hennepin RLR.
2009Summer176 Found in North-central, Northeast, Central, East-central. Only report from western regions: 7/21 Otter Tail CRM. First county breeding record for Cass MRN. High count 6/18 St. Louis (8) TPW.
2009Fall1020 High count 8/27 Mille Lacs (20) RBJ, DAC. Late north 9/11 Mille Lacs RBJ, St. Louis PHS, 9/12 Mille Lacs ASc, 9/17 Aitkin HHD (median 9/8). Late south 9/19 Anoka DWK, 9/20 Scott BAF, 9/23 Dakota SLP, 9/24 Hennepin SLC (median 9/21). Female “Lawrence's Warbler” 9/14 Anoka DWK.
2010Spring1422 Early south (median 5/5) 5/1 Ramsey HHD, 5/3 Hennepin KRo, 5/4 Rice TFB. Early north (median 5/8) 5/12 Cass ABi, 5/13 Cass BAW, 5/14 Hubbard MAW. High count 5/12 Hennepin (8) CMB. Late south away from breeding areas 5/23 Yellow Medicine BJU, 5/26 Rice TFB.
2010Summer173 Observed in all northern and central regions.
2010Fall1520 High count 8/15 Wadena (4) LMS. Late north 9/5 Marshall PRH, LMS, CRM, LS, 9/19 Todd HHD, then 11/6 Crow Wing †KRW, 18 days later than any previous records (median 9/9). Late south 9/16 Blue Earth (2) ChH, 9/17 Hennepin SLC, 9/18 Hennepin (2) CMB (median 9/22). “Brewsters” hybrid 9/4 Scott (male, Murphy-Hanrehan P.R.) BAF.
2011Spring2233 Early south (median 5/5) 5/5 Hennepin ChH, 5/6 Hennepin DWK, CMB, TAT, then widespread arrivals 5/7. Early north (median 5/8) 5/10 Cass (2) BAW, Kanabec RAE, 5/11 Aitkin MHe, Becker ASM, Cass (2) ABi. High counts: 5/21 Pine (15, Nemadji S.F.) WCM, 5/15 Carver (12) MDe. Late south away from breeding areas 5/26 Dakota (Ritter Farm Park) NSk, 5/28 Lac qui Parle (2) BJU (median 5/28).
2011Summer217Found in all northern and central regions. First county breeding record from Beltrami BWa. High count 6/18 Pine TPr, QYo.
2011Fall1419 High counts 8/20 Anoka (5, Carlos Avery W.M.A.) ACr, 9/3 Carver (5, Minnesota Landscape Arboretum) JCy. Late north 9/6 St. Louis (2) JeP, 9/8 Aitkin (McGregor Marsh S.N.A.) RBJ, DAC, 9/13 Pine LMS (median 9/9). Late south 9/25 Hennepin TAT, CMB, 9/26 Dakota SLP (median 9/22).
2012Spring2031 Early south (median 5/5) 5/2 Olmsted LAV, Ramsey RMD, 5/3 Hennepin CMB, BBy, JSI, MBS, SBM, CRM, Olmsted JWH, Ramsey RMD, RZi, Rice TFB, Winona ANy. Early north (median 5/8) 5/4 Todd JLK, 5/5 Morrison FGo, MJB, Todd JLK. High count 5/7 Todd (6) JLK. Late south away from known breeding areas 5/20 Wright (Succonix W.M.A.) MJB, 5/27 Lac qui Parle (Big Stone N.W.R.) BJU (median 5/28).
2012Summer233 Observed in all northern and central regions. High count 6/4 Aitkin (8, McGregor) DBr. First county breeding record from Morrison fide BBA.
2012Fall1426 High count 8/30 Pine (15) RBJ. Late north 9/6 Itasca EEO, St. Louis DYo, 9/9 Morrison DLP, 9/13 St. Louis LMS, CRM, ALo (median 9/9). Late south 9/13 Goodhue GJM, Hennepin CMB, Rice DAT, 9/14 Hennepin CMB, Washington PNi (median 9/22).
2013Spring2235 Early south (median 5/5) 5/8 Olmsted (2) AlJ, Ramsey AZi, TOb, Rice DAT, Washington ASi, PNi, Winona MGo, widespread arrivals 5/10. Early north (median 5/8) 5/16 Cass BAW, Itasca SC, ScW, 5/17 Becker DBM, Clay TCL, Crow Wing SMu, Mahnomen CAB, DBM, Pine RBJ. High counts 5/25 Pine (10) JCC, 5/27 Beltrami (8) PBD. Late south outside of breeding areas 5/29 Carver JCy, Lyon GWe, 5/30 Carver JCy (median 5/28).
2013Summer279 Observed in all northern and central regions plus Rice. High count 6/1 Pine (8, St. Croix S.P.) BWi.
2013Fall1615 Late north 9/12 Morrison RBJ, 9/14 Carlton AVa, followed by a record-late individual 11/12–14 St. Louis ph. AM (prior record late north 10/19). Late south 9/21 Hennepin ACr, 9/22 Ramsey DPa, 10/1 Hennepin CMB, TAT (median 9/22.
2014Spring2338Early south (median 5/5) 5/5 Hennepin PWh, Olmsted MGe, Steele (3) PSu, Washington ECl, 5/6 Dakota ADS. Early north (median 5/8) 5/7 Hubbard MaH, 5/8 Morrison HCT, 5/9 Crow Wing JPR. High counts 5/19 Aitkin (10) GKr, 5/29 Cass (10) SBM. Unusual north report 5/24 Kittson KRE, m.ob. Late south away from breeding range 5/26 Hennepin BCh, 5/29 Dakota DTr, 5/30 Hennepin HCT (median 5/28).
2014Summer186Found in all northern and central regions. High count 6/3 Otter Tail (20) EH.
2014Fall1724 New county record: 8/30 Nobles BTS. High counts 9/1 Anoka (7, Carlos Avery W.M.A.) SBM, 9/1 Nicollet (7, Seven Mile Creek C.P.) WCM. Late north 9/3 Aitkin JMs, St. Louis JMr, 9/8 Crow Wing HLa, 9/9 Kanabec DPG (median 9/9). Late south 9/18 Anoka ELC, McLeod RAE, Steele PSu, 9/22 Carver JTe (median 9/22).
2015Spring1941 Early south (median 5/5) 5/3 Hennepin JBs, Scott BAb, Washington PNi, 5/4 Olmsted LAV, Scott MSw. Early north (median 5/8) 5/6 Crow Wing JPR, Mille Lacs KMa, 5/7 Carlton WBo, Crow Wing ABi, JPR, Pine BDo. High counts 5/15 Aitkin (15, Rice Lake N.W.R.) KCR, 5/16 Isanti (15, Anderson C.P.) NSa, WRA, JS. Late south away from breeding areas 5/25 McLeod PRH, Washington BCo, 5/26 Lyon RJS (median 5/28).
2015Summer263 Observed in northern half of state plus Anoka, Isanti, Sherburne. First county breeding record for Otter Tail SrS.
2015Fall1929 High counts 8/4 St. Louis (7, Sax-Zim Bog) CsB, 8/1 Crow Wing (5) EGa. Late north 9/12 Pine JyS, 9/22 St. Louis AJa (median 9/12). Late south 9/25 Dakota ADS, Steele PSu, 9/27 Fillmore DWK (median 9/24).
2016Spring2441 Early south (median 5/5) 4/30 Rice TFB, 5/4 Hennepin SBE, JcM, 5/6 Carver JCy, 5/7 Anoka. Early north (median 5/8) 5/11 Cass SC, Pine SC, St. Louis ClN, 5/12 Pine SC. High counts 5/23 St. Louis (17, Sax-Zim Bog) KCR, 5/22 Clearwater (15, Itasca S.P.) NKu.
2016Summer257 Observed in all northern and central regions. High count 6/6 Aitkin (15, Rice Lake N.W.R.) BFs, MTd.
2016Fall2729 High counts 8/21 Hennepin (8) LiH, 9/7 Washington (7) BDo, 9/8 Carver (7) JCy. Late north 9/11–12 Morrison SEm, 9/13 St. Louis (Hawk Ridge/Lester River Census) KJB (median 9/12). Late south 9/25 Carver WCM, 9/27 Wright ToL, 9/29 Hennepin ADr (median 9/24).
2017Spring2637 Early south (median 5/5) 5/3 Washington ERH, 5/4 Hennepin HSu, 5/7 Goodhue JBu, Rock GWe. Early north (median 5/8) 5/10 Cass DAY, Crow Wing ABi, Mahnomen REn and then many beginning 5/13. High counts 5/25 Aitkin (25, Rice Lake N.W.R.) JDz, 5/28 Becker (16, Tamarac N.W.R.) MBH, 5/19 Carlton (13, Jay Cooke S.P.) MRs, CHb, 5/27 Clearwater (12, Itasca S.P.) NKu, SKu. Presumed late south migrants away from breeding areas 5/28 Hennepin KWa, 5/31 Washington LiH, ECl (median 5/28).
2017Summer237 Reported from all regions except Southwest, South-central, Southeast. High counts 6/3 Aitkin (15, Rice Lake N.W.R.) ebd, 6/12 Becker (14, Tamarac N.W.R.) MBH.
2017Fall2132 High counts 8/14 Mille Lacs (11) ebd, 8/21 Mille Lacs (8, Mille Lacs Kathio S.P.) KSz. Late north 9/28 St. Louis H.R.B.O., 10/1 St. Louis H.R.B.O. (median 9/13). Late south 9/26 Carver JCy, Stearns MKo, 9/29 Hennepin CMB (median 9/25).
2018Spring2737 Early south (median 5/4) 5/2 Carver JCy, 5/3 Dakota CJE, Hennepin ebd, 5/5 Winona BDo, then numerous reports beginning 5/6. Early north (median 5/10) 5/7 Cass (2) JhH, 5/8 Cass (different location) BEc, 5/9 Morrison FGo, Pine KrM, St. Louis JPR, ArL. High counts 5/26 Aitkin (14, Rice Lake N.W.R.) ebd, 5/18 Clearwater (12, Itasca S.P.) PBk, NKu, 5/22 Wadena (12) REn. Presumed late south migrants away from breeding areas (median 5/28) 5/26 Scott ebd, 5/28 Olmsted BLa, Wright RCl (median 5/28).
2018Summer2211 Reported from all northern and central regions. First county breeding record 6/25 Carlton JLK.
2018Fall2339 Almost exclusively reported east of a line from Polk to Martin counties. High counts 9/8 Fillmore (12, Forestville/Mystery Cave S.P.) ToM, 8/21 Sherburne (8) RAE. Late north 9/12 Crow Wing JhH, PSP, 9/15 Itasca TCL, Mille Lacs DWK (median 9/13). Late south 9/24 Hennepin ClB, Houston ebd, 9/29 Rice MrB, 10/6 Hennepin (St. Louis Park) †DeJ (median 9/25).
2019Spring2646 Early south (median 5/4) 5/4 Freeborn ebd, Goodhue LiH, Hennepin ebd, Ramsey ebd, then in three additional counties on 5/5. Early north (median 5/10) 5/9 Hubbard CoC, 5/13 Hubbard REn, AxB, Pine KrM, and in four additional counties on 5/14. High counts 5/26 Aitkin (23, Rice Lake N.W.R.) ebd, 5/14 Hennepin (10, Wood Lake N.C.) ASu. Presumed late south migrants away from breeding areas 5/29 Carver JCy, Hennepin BAF, Washington PNi (median 5/28). Notable reports from the western edge of the state where this species can be hard to find: 5/14 Nobles BDo, 5/16 Big Stone HCT, PEB, SBM, 5/17–21 Stevens BDo, ASu, 5/20 Norman (female, Wild Rice Twp.) ANy, DBz.
2019Summer236 Reported from all northern and central regions. First county breeding record: 7/16 Lake of the Woods REn. High count 6/10 Aitkin (12, Rice Lake N.W.R.) ebd.
2019Fall2535 High counts 8/31 Anoka (7, Linwood Lake) ebd, 9/1 Ramsey (7, Chatham Open Space) LiH, 9/8 Mille Lacs (7, Milaca W.T.P.) DWK. Late north 9/14 Lake SLL, JWL, 9/16 St. Louis StK, 9/28 Kanabec SPS (median 9/13). Late south 9/24 Nicollet RZi, 9/25 Hennepin CMB, 10/7 Hennepin (Veterans Memorial Park) ebd (median 9/25).
2020Spring2647 Early south (median 5/4) 5/1 Carver JTg, 5/2 Hennepin ebd, 5/5 Houston SDz, 5/6 Brown SLH. Early north (median 5/10) 5/14 Crow Wing LoM, Pine LEv, 5/15 Carlton HGe, Crow Wing PSP, LoM, Kanabec SPS, Otter Tail ShG, HeH. High counts 5/20 Pine (16, Saint Croix S.P.) TJo, 5/22 Chisago (10, Wild River S.P.) ebd, 5/25 St. Louis (10, Sax-Zim Bog) ebd, 5/16 Carver (9, Minnesota Valley N.W.R., Rapids Lake) JCy, 5/25 Cass (9) REn. Presumed late south migrants away from breeding areas 5/29 Hennepin HPe, MyP, Washington JDS, 5/30 Carver ebd, Washington DFN, JZj (median 5/28).
2020Summer248 Reported from all northern and central regions. High counts 6/9 Pine (15, Saint Croix S.P.) TJo, ebd, 6/5 St. Louis (11, Sax-Zim Bog) KWR.
2020Fall2236 Reported mostly from the eastern two-thirds, plus unusual southwestern records 9/1 Jackson ANy, 8/26 Lyon (Garvin Park) GWe. High counts 8/19 Cass (9, Crow Wing S.P.) MJB, 9/10 Hennepin (9) TAT. Late north 9/13 Crow Wing PSP, 9/17 Itasca TCL, 9/22 St. Louis H.R.B.O. (median 9/13). Late south 9/22 Lyon GWe, Ramsey RMD, 9/24–29 Hennepin (two locations) ZSk, SLC, VRL (median 9/25).
2021Spring2941 Reported from more counties (70) than in any other season except spring 2018 (72). Early south (median 5/4) 5/1 Hennepin (Wood Lake N.C.) ebd, 5/2 in Carver, Dakota, Goodhue, Hennepin (two additional locations), Scott, Winona. Early north (median 5/9) 5/8 Mille Lacs ABL, 5/12 Carlton ebd, Cass ebd, Grant CNn, St. Louis (two locations) ebd, SNe, HTo, TRK. High counts 5/23 Aitkin (14, Hedbom Logging Trail Rd.) KWR, 5/15 Cass (11, Blackwater Cabins) ABi, 5/21–22 Aitkin (11, Rice Lake N.W.R.) KWR, ebd. Late south (omitting potential breeders) 5/28 Dakota ebd, 5/30 Isanti JCC, 5/31 Kandiyohi BNn (median 5/28).
2021Summer248 Found in all northern and central regions. High counts 6/5 Aitkin (9, Rice Lake N.W.R.) ebd, 6/13 St. Louis (9, McDavitt Rd.) GWe.
2021Fall1742 Found in all regions. Fewest north reports since 2014, but found in a record number of south counties for fall, including many reports from the Southwest: 8/26 Nobles (Lake Bella) BTS, 8/29 Jackson (Kilen Woods S.P.) DBz, 9/2 Lincoln DBz, 9/3 Rock DBz, 9/19 Lyon (Camden S.P.) GWe. New fall record 9/3 Big Stone (Akron Twp.) KEm. High counts 8/9 Crow Wing (10, Blueberry Bog Trail) MJB, 8/18 Aitkin (8, Big Sandy Lake) ebd, 8/27 Carver (7, Carver P.R.) JCy. Late north 9/12 Itasca ebd, 9/13 Beltrami DPJ, 9/14 Mille Lacs JKu (median 9/14). Late south 9/19 Hennepin ChP, ebd, Lyon GWe, Ramsey ebd, 9/22 Goodhue PEJ (median 9/25).
 
 Breeds mostly north and east-central. Migrant throughout.

Notes:

Click on the bird name to see a photographic image of the bird.
Column N  Number of counties where the bird was seen in the North.
Column S  Number of counties where the bird was seen in the South.