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
Blue-winged Warbler(Vermivora cyanoptera)
YearSeasonNS
1962SpringMay 5 Vasa, Goodhue Co, Bob Janssen; May 12 Frontenac, Goodhue Co., A. C. Rosenwikel.
1962SummerMay 19, Vasa, Goodhue Co., abandoned nest with one Cowbird egg, Avifaunal Club.
1963SpringApril 27, Winona, Mrs. Robert Horton; April 27, Minneapolis, several observers; May 11, Washington Co., D. Honets'chlager (his first record for that area); May 18, Winona, Avifaunal Club; May 30, Fillmore Co., six banded by Orwin Rustad and Carl M. Johnson.
1964Spring5-3 Hennepin Co, MAS; 5-10 Wabasha Co, JPF.
1964Summer7-14, Goodhue Co, ad and 1y, MAS.
1965Springreported by 7 observers; Winona, 5-16, FGD, KK; Goodhue Co, 5-15(FL), 5-19(EWJ) and 5-25 (RDT); Nicollet Co, 5-15, MHM; Cokato, 5-17, EC; westward strays are noteworthy. Golden-winged X Blue-winged Hybrids: these were the "talk of the Season" this Spring, and were also noted in Wisconsin; the most frequently occurring hybrid, "Brewster's Warbler", was reported on 5-11 Frontenac, DB, 5-18 Hennepin Co, EMB and 5-20 Minneapolis FN; the less frequently occurring "Lawrence's Warbler" was reported 5-16 Vasa, Jo Herz, 5-23 Vasa, BDC, 5-25 Goodhue Co (Vasa?), RDT, 5-29 Frontenac, RBJ and 6-3 Vasa fide FN; The reports from Vasa were all undoubtedly of the same bird; prior to this year there were, I believe, two Minnesota records for the "Lawrence's" and four records for the
1966Spring4-30 St. Cloud, NMH (details?); 5-7 Vasa, BL; 5-15 Winona. GD, GG, FV; 5-21 Rochester, JPF; 5-21 Goodhue Co, EMB; 5-22 Vasa, DB; 5-26 Ada, Norman Co, BRK (details? very northerly record); 5-30 Nerstrand, JRR.
1966Summerseen all summer at Vasa, Goodhue Co by many observers. Blue-winged x Golden-winged Warbler December, 1966 hybrid: 6-12 Vasa, Goodhue Co, VL reports "Bird singing in tree top, saw it briefly, head and underparts all yellow, black markings of the golden-winged; wing bars; song three short buzzes, one longer and on different pitch;" on 6-25 DB saw what was apparently the same bird in the same place; description fits the phenotype commonly known as the "Lawrence's Warbler."
1967Springearly 5-20 Winona Co., FGD; 5-21 Goodhue Co., EMB; 5-23 Olmsted Co., CMJ, JPF.
1967Summerreported from Winona, Goodhue, Dakota Co's. Golden-winged x Blue-winged hybrid: 7/4 Vasa, Goodhue Co., 1 ad, identified as the "Brewster's" phenotype, FN/ MAS.
1967Fall 9-4 Fargo-Moorhead, 1 banded, OAS.
1968Spring early 5-3 Houston Co., FL; 5-11 Houston Co., KP, DB, VL, Goodhue Co., BL and Hennepin Co., fide RDT; 5-12 Houston Co., ELC, RLH, Goodhue Co., EMB; 5-14 Goodhue Co., EHH.
1969Spring5-6 Filmore Co., BL; 5-10 Goodhue Co., RBJ.
1969Summerreported from Winona and Houston Co's. 1/3 December 1969
1970Springearly 5-7 Dakota DB; 5-9 Dakota FL; 5-10 Goodhue EB; peak 5-17 Goodhue (1 0) KE. BREWSTER'S WARBLER: 5-8 Minneapolis, Hennepin Co. WL: "typical pattern; singing; seen in same place as one seen in fall 1969."
1970Summernested in Winona Co. (july, 4 y) BTV and reported from Houston and Goodhue (Vasa) Co's.
1971Spring6 reports VL; 5-13 Goodhue FN, DB; 5-14 Goodhue BDC-5-15 Dakota FL; 5-17 Winona TV and Washington BDC. Brewster's Warbler: 2 reported on 5-21 at Frontenac, Goodhue Co. by MHM and VL; good details.
1971Summernested in Washington; also reported from Goodhue and Houston.
1972Summerseen in WASHINGTON (June, 4 adults, May Twp., EC).
1972Fallwas in Lyon Co. on 9-10 (HK); this species is seldom reported away from south-
1973Summer Reports from Anoka (7-14 SC), Goodhue, Winona, and Houston. . Tennessee Warbler Seen in Cook, St. Louis, Itasca, Crow Wing, Aitkin, Pine, Anoka, Washington, Ramsey, Hennepin, and Winona.
1974Summer Reported from Washington, Goodhue, Winona, Houston, Fillmore.
1975Spring 10 records: 5-6 Hennepin (1) EWJ; 5-9 Blue Earth (1) VR; 5-10 Fillmore JF; 5-12 Goodhue (1) DB; 5-13 Goodhue (1) BDC; 5-14 Goodhue (4) and 520 Houston (2) ETS; 5-14 Freeborn DG; 5-19 Anoka (1) SC; 5-31 Goodhue (2) FN. Brewster's Warbler 2 reports of this hybrid: 5-7 and 5-8 Hennepin ETS, and 5-12 Hennepin PVK.
1975Fallonly report 8-20 Houston KE.
1976Spring 14 reports: 5-1 Fillmore RKJ; 5-8 to 5-21 Goodhue many observers; 5-13 Hennepin OJ, PCHS; 5-14 Hennepin HPR; 5-23 Olmsted JF. Brewster's Warbler 1 report of this hybrid: 5-16 Goodhue (1) ETS.
1976Summernested in Winona; also reported from Goodhue, Wabasha, Olmsted, Fillmore and Houston.
1976Fall 8-29 Olmsted JF; only report.
1977Spring 18 reports: 5-3 Fillmore RK; 5-6 to 5-29 Goodhue many observers; also reported from Washington, Houston, Hennepin and Rice Co's.
1977Summer Reported from Goodhue, Olmsted, Winona, Fillmore, Houston, Anoka ("Brewster's" seen 6-11, JH), LakeCook Co. line (6-11, Co. Rd. 7, C. Bergman), and Lake of the Woods (7-4, G. Hodnefield).
1978Spring 1 report out of usual range 5-17 Hubbard GO.
1978Summer Seen in Houston, Winona, Olmsted and Goodhue. "Brewster's" type hybrid seen in Anoka (Cedar Creek NHA, JLH).
1978Fall Four reports: 8-2 and 8-15 Houston EMF, 8-27 Olmsted JF and 9-13 Cottonwood LF.
1979Spring Early south 5-4 Olmsted VH; also reported from Dakota, Goodhue and Mower Counties.
1979Summer Seen in Houston, Winona, Olmsted, Goodhue. The Loon Vot 52
1979Fall Five reports: 8-27 Mower RRK, 9-8 Goodhue BL, Olmsted JSD and JF, 9-14 Houston EMF.
1980Summer Breeding reported from Hennepin, Olmsted; also seen in Anoka (Cedar Creek NHA), Winona, Houston.
1980Fall Three reports: 8-24 Olmsted JF, 8-31 Houston EMF, 9-1 Washington BL.
1981Summer Breeding data from Hennepin. Seen in Rice, Olmsted, Houston.
1981Fall One report: 9-11 Houston EMF.
1982Spring Early south 5-5 Houston EMF, 5-7 Hennepin AB, SC, RJ, 5-8 Hennepin OJ, DGW, Houston JP/ AM, Washington RH.
1982Summer Breeding data from Washington (Afton SP). Seen in Houston, Fillmore, Olmsted, Goodhue, Rice, Hennepin, Anoka.
1982Fall Three reports: 8/15 Brown JSp, 8/19 Houston JP, 8/20 Houston EMF.
1983Spring Early south 5/7 Goodhue DGW, 51 I 0 Hennepin OJ, 5/15 Hennepin SC, Ramsey DZIMC; Brewster's race 5/24 Scott JD.
1983Summer Seen in Anoka (feeding fledglings, Cedar Creek, JLH), Hennepin, Ramsey, Houston, Fillmore.
1983Fall Five reports: 8/30 Hennepin SC, 8/31 Brown JSp, 9/9 Houston EMF, 9/13 Anoka SC.
1984Spring All reports: Hennepin 5/12 JB, 5/l5 SC, 5/28 OJ, DB, PL, Houston 5/13 EMF, 5/16 JPIAM, 5/19 DGS, Winona 5/16 JH, 5/19 AB, Anoka 5/18 SC, 5/20 JH, 5/19 Rice KJ, 5/20 Olmsted RE, Washington 5/20 DZ, 5/21 SSt.
1984Summerseen in Houston, Olmsted, Scott, Dakota, Goodhue, Hennepin , Ramsey and Otter Tail (6/3 SDM).
1984Fall Two reports: 8/25 Winona RJ, 9/12 Houston EMF. Brewst~r~ 8/23 Anoka SC, 9/2 Meeker P. Springetl.
1985Spring Early south 4/28 Ramsey KB, 5/1 Houston EMF, Hennepin 5/2 OBI, 5/3 SC, 5/5 Scott OBI (Brewster's). Reports from six other counties.
1985Summer Probable nesting in Anoka, Ramsey. Also seen in Scott, Dakota, Goodhue, Wabasha, Olmsted, Houston, Brown (all summer Flandrau State Park, JSp).
1985Fall Late south 8/30 Ramsey KB, 9/2 Houston EMF, 9/10 Brown JS.
1986Spring Early south 4/30 Dodge RJ, Ramsey KB, 5/4 Houston JM, GS, 5!5 EMF, 5/6 Washington BE, 5/9 Hennepin SC, Fillmore AMP, Brown JS.
1986Summer Probable nesting in Ramsey. Also seen in Anoka, Washington, Scott, Houston.
1986Fall All reports: 8/1 and 9/4 Houston EMF, 8/9 Goodhue TT, 8/24 Ramsey KB and 9/20 Wabasha AP.
1987Spring Early south 4/25 Lac qui Parle OJ, 4/30 Houston EMF, 5/2 Fillmore AP.
1987Summer Probable nesting in Ramsey. Also seen in Anoka, Scott, Wabasha, Olmsted, Winona, Houston, Fillmore. Brewster's Warbler seen 7/19 in Fillmore (Spring Valley, AP).
1987Fall Reported from seven counties; late south 8/23 Scott AB, 8/28 Dakota TT, 9/1 Fillmore ANO.
1988Spring Early south 5/2 Houston EMF, 5/3 Scott KR, 5/4 Hennepin SC.
1988Summer Nested in Fillmore (NAO); also seen in Anoka, Dakota, Rice, Wabasha, Olmsted, Houston.
1988Fall All reports: 8/1, 9/1 Fillmore NAO, 8/2, 8/30 Houston EMF, 8/6 Crow Wing RJ, 8/13 Dodge AP, RJ, 8/24 Wabasha AP, 8/27 Olmsted BSE.
1989Spring Early south 4/30 Steele AP, 5/4 Houston EMF, 5/6 Washington RH; "Brewster's" Warbler 5/11 Cottonwood ED, "Lawrence's" Warbler 5/13 Fillmore NAO, (The Loon61 :142).
1989Summer Seen in Anoka, Ramsey, Washington, Scott, Dakota, Nicollet, Rice, Winona, Fillmore, Houston.
1989Fall All reports: 8/1-9/8 Houston EMF, 8/1 1 Fillmore NAO, 8/28 Anoka SC, 9/19 Hennepin SC. Brewster's 9/2 Anoka SC.
1990Spring Early south 5/3 Fillmore NAO, 5/5 Hennepin RM, Washington DZ and Winona CS, 5/11 Goodhue AB and Scott DC; "Brewster's" Warbler 5/19 Hennepin DZ, 5/28 Otter Tail SDM.
1990Summer Seen in Nicollet LF, Scott, Ramsey, Rice, Goodhue, Winona, Houston.
1990Fall All reports: 8/2-9/5 Houston EMF, 8/19 Brown JS, 8/20 Rice TB, 8/28 Washington RJ, 9/2 Winona CS.
1991Spring Early south 5/3 Winona CS, 5/4 Olmsted BSE, 5/9 Hennepin SC and Rice TB; one north report 5/15 Otter Tail SDM.
1991Summer Seen in Washington, Scott, Dakota, Rice, Goodhue, Winona, Houston; also 6/5 Nicollet LFi.
1991Fall All reports: 8/3 Anoka TT and Dakota EL, 8/20 - 9/4 Houston EMF, 8/27 Washington WL, 8/29 Nicollet LF, 9/4 Ramsey KB, 9/6 Winona CS.
1992Spring Early south 5/8 Hennepin SC, DZ, Nicollet LF, Olmsted JB, BSE and Winona CS, 5/9 Dakota KR, Goodhue EL, Houston EMF, DN, Ramsey AB and Scott KR; “Brewster's” Warbler 5/9 Goodhue EL, 5/11 Anoka JH.
1992Summer Reported in Anoka, Hennepin, Washington, Carver, Scott, Dakota, Nicollet, Rice, Wabasha, Winona, Houston.
1992Fall One north report: 9/3 Wilkin (one) RG, RJ; late south 9/1 Olmsted JB, 9/7 Houston EMF, 9/13 Winona CS. “Brewster's” 8/26 Minneapolis SC.
1993Spring Early south 5/3 Washington PC, 5/6 Anoka JH, Goodhue DSm and Rice TB, 5/7 Hennepin SC, OJ and Winona CS. “Brewster's Warbler” 5/13 Anoka SC.
1993Summer Probable hybrid nesting (Blue-winged male with Golden-winged female) at Tamarac N.W.R. in Becker Co. (PS, BBk; The Loon 65:215); Lawrence's hybrid observed 6/24 at same location. Also observed in Hennepin, Ramsey, Washington, Nicollet, Scott, Dakota, Rice, Winona, Houston.
1993Fall One north report: 8/21 Kanabec RG, RJ. Late south 9/1 Winona CS, 9/2 Houston MCBS, 9/14 Rice TB.
1994Spring Early south 4/30 Chisago RH, 5/6 Rice TB, TF, 5/7 Scott TBr and Winona CS; two north reports 5/21 Roseau, Roseau County (farthest north report ever in Minnesota) SB, 5/21 Indian Point, St. Louis County ME/SK.
1994Summer Nested in Winona; seen in 11 additional counties as far north as Chisago and as far west as Brown.
1994Fall One north report: 8/27 Crow Wing SK. Late south 9/2 Winona CS, 9/21 Houston EMF, 8/26 Anoka JBe. “Lawrence's Warbler” 8/9 Anoka RH, 8/14 Hennepin (female) SC.
1995Spring Early south 5/1 Winona CS, 5/7 Hennepin TT and Scott SK; one north report 5/28 Otter Tail SDM.
1995Summer Nested in Scott; probable breeding in Ramsey, Winona. Also observed in Anoka, Hennepin, Washington, Dakota, Brown, Rice, Goodhue, Houston; plus 6/4–18 Otter Tail RJ et al.
1995Fall No north reports. Late south 9/2 Hennepin SC, 9/3 Winona CS, 9/9 Wabasha RJ. Also reported 8/17 Isanti RJ.
1996Spring Early south 5/14 Winona CS, 5/16 Rice TBo, 5/18 Freeborn ABa. Early north 5/29 Becker BBe, 5/29 (same location as the previous year) Otter Tail SDM.
1996Summer Most reports ever. Observed in eight southeast and east central counties as far north as Chisago; plus Scott, Rice, Nicollet, Brown. Singing male and Brewster's female reported during June in Stearns MJ/DT; also recorded 6/20 Becker BBe.
1996Fall All reports: 9/7 (“Brewster's” hybrid) Anoka JH, 9/8 Freeborn ABa, 9/9 Houston EMF, 9/11 Fillmore NO.
1997Spring Early south 5/11 Houston EMF and Hennepin DZ, 5/15 Fillmore NO. Also reported 5/23+ Brown (Flandrau State Park) JSp, 5/31 Kandiyohi RJF. Only north reports: 5/27 Pine AH/PH, 5/29 Becker BBe. Peak count 5/24 Rice (7) JL.
1997Summer Most reports ever, continuing a seven-year trend showing a gradual increase. Probable nesting recorded in Rice; observed in 15 additional counties as far north as Sherburne and Chisago and as far west as Brown; plus 6/3 Lyon (Camden S. P.) RgS, 6/3 Lincoln (Hole-in-the-Mountain C.P.) RJS.
1997Fall Late south 9/5 Washington RJ, 9/10 Fillmore NO, 9/28 (latest date on record) Houston EMF. “Brewster's Warbler” reported 10/14 (this would be an extremely late for either of the two parent species) St. Louis AE.
1998Spring Early south 4/20 (earliest date on record) Rice CGj, 5/6 Houston EMF and Washington RJ. Only north report: 5/25 Douglas (two males on territory at Lake Carlos State Park) SDM.
1998Summer New nesting in Brown JSp; probable nesting in Rice, Houston. Seen in ten additional east central and southeast counties plus Scott, Nicollet; also 6/19 Cass DZ, 6/26 Douglas RJ (both first county records, the latter was first found in May). Of interest was a partial albino observed in Winona AH.
1998Fall Late south 8/27 Houston (2) FL, 8/30 Rice JL, 9/13 Houston (1) EMF.
1999Spring Arrived south on time, where first reported 5/1 Fillmore NO, AO, 5/2 Rice JL and Hennepin SC. Reported from 23 south counties as far west as Kandiyohi and Brown; more reports than usual. First county record 5/13 Meeker DF. Only north report: 5/30 Morrison (Camp Ripley) WB.
1999Summer Seen in eleven counties roughly along a line from Anoka and Hennepin to Fillmore and Houston; plus 6/12 Jackson DN, 7/3–20 Brown (“Lawrence's” hybrid) JSp, 6/2–7 Todd JSK, SDu.
1999Fall No north reports. Late south 8/29 Brown JSp and Rice TBo, 9/3 Fillmore NO, 9/6 Dakota SWe — earliest south departure since 1991.
2000Spring Reported from 19 south counties, including first county records 5/3 Pipestone (Split Rock Creek S. P.) ND, 5/7 McLeod (Hutchinson) †DF. Early south 5/2 in three counties, then daily arrivals through 5/8. Only reports in the north: 5/15 Douglas RH, 5/30 Clay (Moorhead) †RO (The Loon 72:241).
2000Summer Reported in ten counties within an area extending from Fillmore and Houston to Carver and Anoka; plus Nicollet, Brown, Blue Earth, 6/22 Renville KJB, 7/27 Kandiyohi †CRM. Lawrence's hybrid singing 6/4–22 Brown (Flandrau S.P.) JSp.
2000Fall All reports were south and east of a line from Anoka through Brown. Last reported 9/9 Dakota ADS, 9/25 Fillmore NBO.
2001Spring Reported from 23 south counties, including unexpected location 5/6 Cottonwood ED and first county record 5/12 Yellow Medicine RJS. Many late April reports south (recent median 5/2). Early south 4/28 Rice TFB, 4/29 Dakota, Fillmore, and Winona, 4/30 in three counties. All reports north: 5/10 (record early north) Douglas SPM, 5/16 Kanabec CAM.
2001Summer Reported in 14 counties extending from Fillmore and Houston to Meeker, Sherburne, and Anoka; plus Nicollet, Brown. “Lawrence's” Warbler reported in Brown (male?) JSS; “Brewster’s” Warbler observed 6/23 Sherburne RBJ.
2001Fall Observed in 12 south counties. Last reported 9/5 Dakota ADS, 9/18 Fillmore NBO, 9/27 Brown JSS.
2002Spring Observed in 23 south counties beginning 5/3 Olmsted OWB, 5/4 Dakota ADS, TAT and Goodhue OWB. Unusual location 5/5 Lac qui Parle (Big Stone N.W.R.) †PHS, †PCC. First county record 5/15 Pope (Barness Park, Glenwood) †SPM, DKM. Record high count 5/14 Houston (16 at Beaver Creek Valley S.P.) PHS.
2002Summer Seen in 11 Southeast and East-central counties as far north as Isanti; plus Todd, Wright, Carver, Scott, Rice, Blue Earth. “Brewster's” hybrid 6/2 Washington (male) TAT, 6/22 Anoka JLH.
2002Fall Second county record 9/11 St. Louis (banded at Hawk Ridge) DAG. Reported south in September only from Washington and Hennepin; late south 9/14 Hennepin TAT.
2003Spring Reported from 17 south counties, including early reports 5/3 Hennepin DCZ, 5/4 Goodhue SWe. Only western observation 5/17 Pope RBJ (second county record). Two north reports: 5/17–21 Todd JSK, SID, BWF, 5/26 Morrison (Charles Lindberg S.P.) BWF.
2003Summer Reported in Todd (6/20, SID), Stearns, Sherburne, Anoka, Wright, Hennepin, Carver, Scott, Dakota, Rice, Fillmore, Houston; plus new nesting record in Renville MDL.
2003Fall Reported in August from Anoka, Brown, Dakota, Goodhue and Houston, plus 9/1 McLeod PRH, 9/3 Houston RBJ, 9/5 Rice DAB, 9/8 Fillmore NBO. “Lawrence's” Warbler reported 8/21 Scott RBW.
2004Spring Early south 5/1 Rice TFB, 5/2 Lac qui Parle (Garfield Twp.) BJU, 5/6 Fillmore NBO. One north report: 5/12 Morrison (Charles Lindbergh S.P.) BWF.
2004Summer Reported from ten south counties as well as 6/1 Morrison BWF, 6/7, 7/9 Todd JSK.
2004Fall No north reports. South reports in September: 9/2 Freeborn AEB, 9/8 Fillmore NBO, 9/11 Hennepin SLC, 9/18 Carver WCM (median 9/11).
2005Spring Early south 5/5 Fillmore NBO, 5/6 Anoka JLH, Rice DAB and Scott WCM. Unusual location 5/7 Jackson (Robertson C.P.) KRE et al. MAJ and DCT noted this species' gradual displacement of the Golden-winged Warbler in Stearns. In support of this observed expansion were two north reports: 5/7 Beltrami (Pine Tree C.P., record-early north) BJU, 5/15 Morrison (Charles Lindberg S.P.) JJS, BWF, HHD.
2005Summer Reported from 17 southern counties. At Murphy-Hanrehan P.R., a female Blue-winged Warbler paired with a male Lawrence's Warbler fledged four or five young in Scott BAF.
2005Fall No north reports. Found in 12 counties south, including 8/23 Lac qui Parle BJU. All September reports south: 9/2 Houston FZL and Rice (2) DAB, through 9/11 in Fillmore NBO
2006Spring First south reports matched recent median. Early south 5/2 Fillmore NBO, 5/3 Dakota, Goodhue, Olmsted, and Rice. Three north reports: 5/20 Pine MCA, 5/21 Clay LEC, 5/31 Morrison DFN. High count 5/15 Sherburne (9 along Blue Hill Trail, Sherburne N.W.R.) ASc.
2006Summer Observed in 17 south counties as far west as 6/6 Yellow Medicine (2 at Upper Sioux Agency S.P.) BJU, 6/9 Lincoln (Shaokatan Twp.) MCBS.
2006Fall No north reports. South reports from 10 counties, as far north as Chisago and Sherburne, and unusually far west in Lac qui Parle (8/24, BJU). Late south 9/5 Goodhue LEC, 9/6 Fillmore (3) NBO, 9/19 Hennepin ChM (median 9/11).
2007Spring324 Early south 5/1 Carver CRM, 5/2 Dakota JPM, 5/4 Goodhue, Rice, Scott, Washington (median 5/2). Continued range expansion indicated by new county records 5/3 Mille Lacs (Kunkel W.M.A., record early north) †ASc, 5/14 Redwood (along Minnesota River, Delhi Twp.) WCM. All other north reports: 5/12 Morrison REH, 5/15 Todd JJS (median 5/23). High count 5/9 Scott (8 at Murphy-Hanrehan P.R.) BAF.
2007Summer219 Most reports ever. Reported from all regions of south except West-central, plus 6/2 Mille Lacs HHD, 6/17 Hubbard HHD, KRE.
2007Fall13 Most reports from Southeast region, ranging north to Chisago and Sherburne and west to Brown. Late south 9/9 Wabasha RBW, 9/11 Fillmore JWH (median 9/12).
2008Spring124 Early south (median 5/2) 5/2 Rice DAT, 5/5 Wabasha and Winona HHD, JWH. Only north report 5/29 Hubbard (nest-building) AEK. High count 5/26 Scott (13, Louisville Swamp, all males on territory) BAF.
2008Summer20 Reported from Central, East-central, South-central, Southeast.
2008Fall15 High count 8/30 Scott (4) BAF. No north reports. September south reports 9/3 Waseca LBF, 9/4 Goodhue LEC, 9/7 Sibley WCM, 9/8 Fillmore NBO, 9/9 Carver JCy (median 9/12).
2009Spring26 First spring since 2002 with no north reports. Early south (median 5/2) 5/4 Rice TFB, 5/5 Blue Earth ChH, Mower ARW, Rice DAB, 5/6 Anoka REH. High count 5/17 Scott (11, Murphy-Hanrehan P.R., all were territorial males) BAF.
2009Summer221 All north reports: 6/8 Morrison (Sky View Rd) CRM, 6/11 Cass ACo, 6/13 Cass (Pine River) BAW. New county record: 6/16 Big Stone RPR. Also found in East-central, South-central, Southeast. High counts 7/5 Scott (5) DWK, 7/18 Sibley (5, Vale W.M.A.) JCC.
2009Fall11 Reported as far north as Chisago, Sherburne. September reports 9/4 Carver (3) JCy, Chisago DPG, Dakota RBW, Houston NBO, 9/7 Scott HHD, 9/11 Carver JCy (median 9/11).
2010Spring321 Early south (median 5/2) 4/30 Scott JEB, 5/2 Carver (2) JCy, Goodhue LS, Rice (2) MDu, Washington DFN. All north 5/15 Pine PEB, 5/24 Mille Lacs ASc, 5/29 Cass LEC (median early 5/23). High counts 5/9 Scott (9, Murphy-Hanrehan P.R., south trails) BAF.
2010Summer115 Found in southeastern quarter of state as far north as Mille Lacs (6/4, ASc). First county breeding record from Sherburne PLJ, PMJ.
2010Fall113 Only north 8/3 Mille Lacs ASc (median late 8/27). High count 8/6 Carver (3, Rapids Lake) JCy. Late south 9/13 Sherburne ASc, 9/20 Hennepin (Lake Hiawatha.) DDo (median 9/11).
2011Spring329 Early south (median 5/2) 4/30 Carver JCy, Rice JLO, JWH, 5/5 Hennepin CMB, MaK. New county record south 5/21 Watonwan HHD. All north (median early 5/23) 5/13 Mille Lacs ASc, 5/21 Pine WCM, 5/24 Itasca (Forest History Center, Grand Rapids) ph. †SC, 5/26 Itasca ph. †EEO. High counts 5/9 Goodhue (10, Hok-si-la Park) JMN, 5/19 Scott (10, Murphy-Hanrehan P.R.) CMB.
2011Summer20Reported from East-central, Central, Southeast, South-central. First county breeding record from Carver JCy. High counts 6/11 Sherburne (5, Sherburne N.W.R., Blue Hill Trail) NBa, 6/30 Scott (5, Murphy-Hanrehan P.R., pet trails) DKa.
2011Fall110 Only north report 9/4 Douglas (Lake Carlos S.P.) JCC. High counts 9/4 Houston (8, Beaver Creek Valley S.P.) ACr, 8/21 Carver (4, Carver P.R.) JCy. Late south 9/7 Scott (Murphy-Hanrehan P.R.) BeS, 9/9 Rice LMS, 9/18 Houston HHD (median 9/11).
2012Spring125 Early south (median 5/2) 4/26 Rice TFB, 5/2 Hennepin RDa, SBM, Martin LBF, Olmsted JWH, Scott (5) MMz, Sherburne ASc, Winona ANy. Only north report 5/13 Morrison FGo (median 5/23). High counts 5/28 Goodhue (7, Pioneer State Trail) GJM, 5/4 Carver (6, Rapids Lake) JCy.
2012Summer422 Found in Central, East-central, South-central, Southeast. High count 6/7 Houston (8, Beaver Creek Valley S.P.) DSt.
2012Fall114 One north report 8/23 Pine RBJ, DAC (median late 8/27). Late south 9/6 Anoka DPG, 9/13 and 9/19 Rice (Carleton College Cowling Arboretum) GHo (median 9/11).
2013Spring223 Early south (median 5/2) 5/4 Goodhue (2) RTe, 5/7 Houston LMl, Wabasha DBz, 5/8 Rice DAB, Washington DBM, Winona MGo, ClN. Also notable was one 5/16–17 Yellow Medicine (Upper Sioux Agency S.P.) CoN. All north reports (median arrival 5/21) 5/20 Morrison FGo, 5/22 Pine JSa, 5/25 Morrison FGo. High count 5/23 Carver (8, Carver P.R.) JCy.
2013Spring1 Early south (median 5/2) 5/4 Goodhue (2) RTe, 5/7 Houston LMl, Wabasha DBz, 5/8 Rice DAB, Washington DBM, Winona MGo, ClN. Also notable was one 5/16–17 Yellow Medicine (Upper Sioux Agency S.P.) CoN. All north reports (median arrival 5/21) 5/20 Morrison FGo, 5/22 Pine JSa, 5/25 Morrison FGo. High count 5/23 Carver (8, Carver P.R.) JCy.
2013Summer420 Found in Central, East-central, South-central, Southeast, plus Cass. High count 6/8 Scott (12, Murphy-Hanrehan P.R.) JJo. First county breeding record for Pine EHl.
2013Summer1 One “Brewster's” found 6/1 Carver (Carver P.R.) JCy.
2013Fall116 Only north report 8/5 Pine (adult feeding juvenile) EHl (median late 8/27). Late south 9/8 Scott BAb, 9/12 Carver JCy, 9/15 Dodge ANy (median 9/11).
2014Spring25Early south (median 5/2) 5/5 Rice DAB, 5/6 Freeborn BWF, widespread reports 5/7. High counts 5/24 Washington (12, William O'Brien S.P.) ASi, 5/10 Washington (9, Afton S.P.) JEd. First spring with no north reports since 2009.
2014Summer219Reported from Central, East-central, South-central, Southeast. High count 6/6 Olmsted (8, Chester Woods) 
2014Fall19 No north reports. Late south 9/11 Faribault KMS, CRM, Hennepin CMB, 9/26 Ramsey CRM, and then a record late individual 10/4 Fillmore NBO (median 9/11).
2014Fall13 Four hybrids reported this season: 8/17–23 St. Louis (“Brewster's”, Park Point R.A.) JLK, †PHS, KRE, 8/23 Washington (“Brewster's”, Paul Hugo Farms W.M.A.) †RMD, 8/25 Carver (Carver P.R.) PTn, 8/28 Dakota (“Lawrence's”, Lebanon Hills R.P.) ADS.
2015Spring333 Widespread reports with two first county records and several additional reports outside normal range. Early south (median 5/2) 5/3 Anoka DWK, HHD, ELC, CRM, Carver JCC, Fillmore DCZ, Scott BAb, Washington (6) BDo. Unusual south reports: 5/6 Pipestone (Pipestone N.M.) TKa, 5/12 Lac qui Parle DLP, 5/14 Murray (Lake Shetek S.P.) HHD, 5/15 Benton ANy, 5/15 Martin GLa, 5/17 Redwood BTS, 5/21 Cottonwood TKa. All north reports (median early 5/20) 5/16 Becker (Hamden Slough N.W.R.) RBJ, 5/18 St. Louis (Duluth) LME, 5/23 Pine SBE. High counts 5/16 Isanti (15, Anderson C.P.) NSa, JSa, 5/8 Washington (12, William O'Brien S.P.) SOa, 5/16 Hennepin (12, Crow-Hassan P.R.) JCr.
2015Summer222 Seen in Central, East-central, South-central, Southeast. High count 6/14 Scott (7, Murphy-Hanrehan P.R., main trailhead) BDo.
2015Fall17 No north reports. High count 8/17 Washington (3, Afton S.P.) PNi. Late south 9/12 Rice TFB, Scott BAb, Washington JEc, 9/18 Washington HHD, RAE (median 9/13).
2016Spring330 Early south (median 5/2) 4/28 Steele PSu, 5/3 Dakota GHo, and from Carver, Fillmore, Houston, Ramsey, Scott, Washington on 5/5. Also noteworthy were these reports beyond the species' typical range: 5/14 Murray JPr, 5/15 Redwood JSc, MiO, 5/28–30 Yellow Medicine (Spellman Lake) RCu, GWe. Only north reports 5/20 Kanabec DPG, 5/21 Morrison JSP, Clearwater (Itasca S.P.) ASu. High counts 5/12 Carver (11, Minnesota River Valley N.W.R., Rapids Lake) JCy, 5/16 Scott (9, Murphy-Hanrehan P.R.) JCa.
2016Summer323 Seen in Central, East-central, South-central, Southeast. High count 6/11 Scott (8, Murphy-Hanrehan P.R.) CAs. First county breeding record 7/5 Wabasha KnM.
2016Fall19 High count 8/31 Carver (3, Carver P.R.) JCy. Late south 9/6 Sherburne HHD, 9/7 Carver JCy, 9/8 Olmsted JHD, 9/12 Olmsted LAV (median 9/14).
2017Spring428 Early south (median 5/2) 5/5–6 Goodhue (Hok-Si-Lah Park) LiH, m.ob., 5/7 Hennepin JBs, Houston DSt, 5/8 Anoka MAJ. All north 5/13–23 Morrison FGo, Todd TLu, 5/17 Pine DBz, ANy, 5/20 Becker FGo, 5/21–23 Pine MJB, JWH, ELC, KMa. High counts 5/24 Carver (13, Carver P.R.) JCy, 5/27 Washington (12, William O'Brien S.P.) BDo, KvM, 5/13 Hennepin (10, Crow-Hassan P.R.) JCr.
2017Summer123 Found in Central, East-central, South-central, Southeast. High count 6/27 Scott (8, Murphy-Hanrehan P.R.) GMo.
2017Fall113 High counts 9/1 Sherburne (4) MJB, 9/3 Sherburne (4, Sherburne N.W.R.) AtK. Only north report 8/27 Pine SBE. Late south 9/9 Fillmore ToM, Wright RAE, MJB, 9/25 Washington BDo (median 9/14).
2018Spring227 Early south (median 5/2) 5/2 Olmsted JHD, 5/4 Washington BDo, 5/5 Anoka MGi, Carver JCy, Le Sueur BHe, Olmsted MPe, Scott BAb, MAK, Winona BDo. An interesting out-of-range report for the fourth consecutive year 5/21 Kandiyohi (Sibley S.P.) ANy, DBz. All north 5/13 Pine JJS, JPr, 5/20 Pine (Banning S.P.) JBu, 5/21 Pine KrM, 5/26 St. Louis (H.R.N.R.) EBr, JPR. High count 5/13 Carver (14, Carver P.R.) JCy.
2018Summer225 Found in all regions except northern and western. High counts 6/15 Carver (7, Carver Park Reserve) JCy, 6/26 Houston (7, Reno—Hillside Rd) LiH, IsH, EzH. First county breeding record 7/14 Chisago MTe.
2018Fall27 Reported mostly from Southeast and East-central counties as far north as Stearns. High count 8/6 Carver (8, Carver P.R.) JCy. Out-of-range reports 8/21 Watonwan RBW, 9/10 Lyon (Garvin Park) RJS. Late south 9/12 Olmsted LAV, Ramsey HHD, Sherburne HHD, 9/15 Anoka ebd, 9/16 Scott BAb (median 9/14).
2019Spring231 Reported mainly from East-central and Southeast regions. Early south (median 5/2) 5/2 Olmsted MPe, 5/5 Dakota m.ob., Fillmore ANy, JWH, ToM, Steele ClB, LiH, PSu. All north 5/11 Grant (Niemackl Lake Park) GHo, KDS and several reports from Pine from 5/16–26 in various locations (Pine City W.T.P., Snake River Campground, St. Croix S.P., and Chengwatana S.F.). High counts 5/25 Washington (12, Afton S.P.) DAd, 5/26 Olmsted (12, Chester Woods) BLa. Reports outside normal range: 5/20 Lyon NMe, 5/12 Martin BDo.
2019Summer126 Found in all central regions plus South-central, Southeast. Unusual locations 6/1 Kanabec SPS, 6/17 Pope ANy. High count 6/2, 6/11, 6/18 Carver (9, Carver P.R., Grimm Rd.) JCy.
2019Fall21 One report from the extreme western edge of this species range 8/3 Kandiyohi (Sibley S.P.) BDo. High counts 8/30 Carver (9, Carver P.R.) JCy, 8/31, 9/6 Houston (5, Beaver Creek Valley S.P.) ToM, ShG, HeH. Late south 9/17 Hennepin ebd, 9/18 Rice NiR, 9/21 Carver JCy (median 9/15).
2020Spring135 Reported from its typical range in the Southeast, East-central, South-central and Central regions. Early south (median 5/2) 4/28 Rice TFB, 5/1 Houston ASu, 5/2 Hennepin SOa, Houston LHl, AaL, LAV, CLu, 5/3 Houston LS, FFa, MaJ. All north 5/20 Pine TJo. High counts 5/21 Carver (12, Carver P.R.) ABl, 5/20 Scott (11, Murphy-Hanrehan P.R.) BxP, 5/22 Washington (11, Afton S.P.) BDo, 5/27 Scott (11, Cleary Lake R.P.) BxP, 5/22 Fillmore (10, Forestville S.P.) ToM.
2020Summer226 Found in all southern regions, Central, East-central, plus 6/2 Beltrami (Bemidji) †RMr. High counts 6/5 Carver (12, Carver P.R., Grimm Rd. Area) JCy, 6/6 Scott (11, Murphy-Hanrehan P.R.) BxP.
2020Fall21 Reported almost entirely from the southeastern quarter. High counts 8/15 Carver (7, Carver P.R.) JCy, 9/4 Dakota (4, Miesville Ravine P.R.) JCC. Late south 9/16 Hennepin ebd, Scott BHe, 9/18 Dakota BAF (median 9/15).
2021Spring428 Found mostly within Central, East-central, South-central, and Southeast regions. Best northern showing since 2017. Early south (median 5/2) 4/29 – 5/1 Anoka (two locations) ebd, GWe, 5/1 Ramsey MJM. All north reports: 5/13 Clay (Hawley) †PBB, 5/14 Pine (Pine City) KrM, 5/17 Mille Lacs (Princeton) ebd, 5/22 Todd (Kandota Twp.) REn, RLF, 5/24 Pine (Snake River Campground) ebd, 5/29–5/30 Pine (St. Croix S.P.) TKa, Todd (Hewitt) JBu. Record high spring counts 5/17 Carver (17, Carver P.R., Grimm Rd.) JCy, 5/16 Washington (16) DFN. Other high counts 5/12 Washington (12, Afton S.P.) ebd, 5/16 Olmsted (12, Chester Woods) BLa. Unusual Southwest report 5/22 Lyon (Camden S.P.) CRM.
2021Summer225 Found within usual summer range, plus extralimital records 7/11 Rock (Schoeman Park) †LiH, 7/27 St. Louis (Duluth, Park Point R.A.) †JLK. First county breeding record: 6/22 Wright MJB.
2021Fall124 All sightings southeast of line segments from Pine to Stearns to Brown. Only north reports 8/1, 8/18 Pine (Snake River) ebd, SBE. High count 8/22 Washington (5, Afton S.P.) JbS. Late south 9/9 Carver ebd, Goodhue BxP, 9/10 Olmsted (Quarry Hills N.C.) ebd, 9/11 Olmsted (Isaac Walton Wetlands) ebd.
 
 Breeds southeast and east-central.

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.