Seasonal Report Archive for The Loon - Bitterns, Herons, Egrets, Night-Herons 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: Bitterns, Herons, Egrets, Night-Herons
Least Bittern
American Bittern
Little Blue Heron
Tricolored Heron
Snowy Egret
Yellow-crowned Night Heron
Black-crowned Night Heron
Green Heron
Great Egret
Western Cattle-Egret
Great Blue Heron

American Bittern(Botaurus lentiginosus)
YearSeasonNS
1932SummerAnest with four eggs was found by the writer in Polk County, June 2oth. ..
1933Summer '1\ro nests were reported, roth by Sam Grimes. The first, found on June 18th at Thief Lake, Marshall County, contained one egg. The second was found on June 21st in Pennington County, and contained 4 eggs. It was located in a.n alfo.lf'o. field 11/00 feet fram the nearest water."
1934Summer There are no records for the 11 Thunder-pUL'1pcr11 eJccep:t:, that of a bird flushed from a completed but enpty nest at Grand Like by Hiomenz on June 16th.
1935Summer The only observer to report on the Bittern this year wns Dobie, who is stationed at Park Rapids. On June 11th he found 4 eggs.
1936Summer An empty nest of this stealthy creature of the mn.rsh was found by Paul High~/ in a blueberry swamp in St. Louis Co. May 26th.
1940SummerIn a marsh between University Ave. and Hilltop Golf Course (St. Paul) Miss Rhoda Green found a nest with 4 eggs on May 29. At Mendota on June 29, Arnold Erickson and Dana Struthers observed 2 young birds. Mr. A. D. DuBois found a nest of 4 eggs at Lake Minnetonka on June 7·
1943SummerRamsey County, June 15, 4 egg1s. Bro,s. Lewis· and Pius.
1945SummerNest with 3 eggs, June 16, Hennepin Co., Don and Eldeen Jacobs; nest with 1 egg, May 26, Hennepin Co., Fred Blanch and Larry Flahavan.
1947Summer1 nest with 4 eggs, June 6; 1 nest with 4 eggs, June 11; 4 nests with 11 eggs and 2 young, June 29, Lac qui Parle Co., Willis; 1 young, July 27, St. Louis Co., Roberts family.
1961Springseen 26 April near Northfield by Dr. Rysgaard, 30 April in Twin City area by A C. Rosenwinkel and 6 May at north end of Lake Traverse by the Huber brothers.
1961SummerAn adult was seen feeding three downy young near Norwood, Carver County, by Avifauna} Club members on 23 July.
1961FallLast report as for Least Bittern. ;
1962Falllatest date, Oct. 13, Felton, Clay Co., R. Grant.
1962WinterEarly Dec, one seen at Howard Lake, Wright Co., by Mrs. Erma Christopher. An unusual record.
1963SpringApril 12, Roscoe, Stearns County, Jim Muggli; April 15, Kandiyohi County, Mrs. Melvin Broman; April 20, Hennepin and McLeod Counties, A. C. Rosenwinkel; April 27, Lac qui Parle County, Avifaunal Club; May 3, Cokato, Wright County, Erma Christopher; May 13; Shatley, Beltrami County, Mabel Goranson; May 29, Cass County, the Mathisens.
1963Falllatest on Oct. 24, Erma Christopher; Nov. 2, Nicollet Co., Avifaunal Club.
1964Spring3-31 Wright Co, EC; very early; 4-10 Douglas Co, MVS; 4-25 Virginia, VFB and Ely, MWM; 5-2 Stearns Co,RPR; 5-19 Chippewa Co, RLH, 5-11 Marshall Co, DLO.
1964Summerbreeillng in Crow Wing Co, MSB.
1964Fall9-13 Roseau Co, JLR; 9-27 Stevens Co, RAG; 9-28 Duluth, JCG; 10-3 Ottertail Co, RO, RLH; 10-23 Washington Co, ACR.
1965Springearliest 4-8 Douglas Co, MVS; next record 4-21 Cokato, EC and Collegeville, RPR.
1965Falllatest 10-21 Marshall Co, DLO and 11-4 Bloomington, WWL.
1966Springearliest 4-10 Washington Co, ACR; 4-18 Collegeville, RPR and Douglas Co, MVS; 4-21 Two Harbors, RK, Norman Co, GSM and Agaasiz Refuge, DLO.
1966Summerno nests reported; reported from Ramsey, Rice, Wright, Aitkin, Hennepin, Anoka, Big Stone, Nobles, Swift, Morrison, Crow Wing, Roseau, Stearns, Carver, Norman, Cook, St. Louis and Lake Co's.
1966FallLatest 9-23 Washington Co. (DS) and Carver Co. (FN/MAS); 9-26 Roseau Co., PEB; 11-5 Duluth, photographed by H. Gilbert, fide JCG.
1967Springearly 4-12 Marshall Co., AWR; 4-15 Duluth, JGH, Dakota Co., RIC, Lac qui Parle Co., DB; 4-16 Winona Co., FV/ HVBC and Nicollet Co., EMB.
1967Summerreported from Morrison, Nobles, Hubbard, Wright, Clearwater, Hennepin, Pope, St. Louis, Crow Wing, Ramsey Co's.
1967Fall latest 10-4 Hennepin Co., FN/MAS; 10-7 Lyon Co., PE; 10-13 Becker Co., JAH.
1968Spring earliest 4-5 Big Stone Co., JAH; 4-21 Nobles Co., HSH; 4-23 Wright Co., EHD; 4-28 Carver Co., EMB.
1968Summer nested in Hubbard Co; also reported from Wilkin, Swift, Mille Lacs, Clearwater, Cass, Morrison, Lake, Washington, Carlton, Crow Wing, Anoka, Cook, Hennepin, Mille Lacs, Roseau Co's.
1968Fall8 -3 Hennepin MHM; latest 10-6 Watonwan DMF; 10-12 Lyon PE; 10-12 Nicollet DB fide A. Bolduc; 10-20 Nobles HSH; 11-6 Blue Earth EDK.
1969Spring4-5 Hennepin Co., CU; 4-15 Duluth, PBH; 4-19 Chisago Co,. FVS; and Anoka Co., BAP; 4-21 Mille Lacs Co., MI.
1969Summerreported from Beltrami, Marshall, Mahnomen, Clay, Pennington, Clearwater, Mille Lacs, Crow Wing, Ottertail, Blue Earth, Hennepin, Kandiyohi, Dakota, Morrison, Ramsey, Rice, Nobles, and Wright. Good numbers this summer.
1969Fall10-4 Mille Lacs MI; 10-24 Washington RHJ; 10-25 Cass MC for W.H. Carr; 11-11 Pope WH.
1970Springearly south 4-11 Dakota EB; 4-14 Winona TV; early north 4-17 Marshall AR; 4-23 Mille Lacs MI.
1970Summernested in Mille Lacs Co. (Onamia, Ml); also reported from Duluth and Anoka, Meeker, Winona, Stearns, Crow Wing, Marshall, Hennepin, Beltrami, Wright, Murray, and Chippewa Co's.
1970Falllate south 1 0-2 ·1 Winona TV and Carver KH; 11-7 Hennepin PE ; late north 10-19 Marshall A R.
1971Springearly south 4-16 WashingtonBL; 4-17 Houston JLJ; 4-18 Stearns MLC; earlynorth 4-7 Aitkin JB; 4-19 Duluth JH.
1971Summernested in Mille Lacs; also reported from 17 other counties.
1971Falllate 'outh 10..22 l!ennP.pin and Scott 10-n Carver; late north 9-8 Mille Lacs; 10-20 Marshall.
1972Summernested in (Crow Wing), (Mille Lacsl; seen in 18 other counties.
1973Summer Seen in 23 counties. Swan (Species ?) Swift Co. (Hollerberg Lake 7-21 BAH).
1973Fall Reported from St. Louis, Anoka, Stearns. Peak 9-12 Marsall (100) (AWR). Late south 10-7 Rock (KRE) (latest date available!). Fewer reports than usual.
1973Winter An injured bird lingered until 12-25 near Etter, Goodhue Co. (JB).
1974Spring Early south 4-13 Hennepin OJ; 4-17 Stearns NMH; 4-17 Lyon HCK; early north 4-20 Pine ML; 4-21 Marshall AR; 4-23 Cass HRH.
1974Summer Reported from 21 counties.
1974Fall Late south 9-20 Wabasha WDM; 9-25 Ramsey GC; 11-2 Wright B. Johnson; late north 9-15 Itasca DB; 10-28 Marshall AR. ;
1975Spring Early south 4-8 Cottonwood LAF; 4 Winter 1975 13 Hennepin DY; 4-14 Hennepin PG; early north 4-24 St. Louis GJN; 3 reports on 5-2.
1975Summer Reported from 20 counties.
1975Falllate south 11-11 Hennepin OJ; 11-13 Ramsey WL; 1021 Marshall SV.
1976Spring Early south 4-12 Hennepin JG; 4-15 Lac qui Parle CB; 2 reports on 4-17; early north 4-17 St. Louis JCG; 4-19 Marshall SV; 4-20 St. Louis GN.
1976Summerreported from 16 counties; fewer reports than usual.
1976Fall Late north 10-14 Duluth, 10-29 Marshall; late south 9-7 Anoka, 9-14 Wabasha, 9-25 Le Sueur.
1977Spring Early south 4-14 Rock KE; 4-16 Carver DGW; 4-17 Anoka KLF; early north 4-21 Marshall SVA; 4-24 Marshall MS and Otter Tail GO; 4-25 Otter Tail SM. IBIS SP? 1 report: 5-25 (3) Mahnomen John R. Tester, Bruce A. Fall, David F. Parmelee, see Loon 49:181.
1977Summer Nested in Lake of the Woods; also reported from 16 other counties throughout the state; continues less common than formerly.
1977Fall Late north 10-22 Marshall (SV).
1978Summer No breeding reported; seen throughout the state.
1978Fall Peak August Marshall (400) ANWR, summer resident Itasca MS; late north 9-23 Becker SM, 10-1 Aitkin PM, 10-25 Marshall ANWR; late south 9-22 Anoka KL.
1979Spring Early south 4-18 Wright DCF, 4-21 Anoka KL, Lac qui Parle many observers and Winona JB, JSD; early north 4-17 Becker TNWR, Marshall ANWR, 4-18 Beltrami JM. Peak 5-16 Marshall ANWR (200). Whistling Swa,n Early south 3-1 Wabasha JSD, 3-8 Dakota KG, 3-11 Olmsted RE; early north 3-14 Otter Tail SM, 4-4 St. Louis KE, 4-17 Itasca MS. Peak 4-7 Wabasha DGM (3000).
1979Summer No breeding reported; seen throughout the state north of the Minnesota River.
1979Fall Late north 9-25 St. Louis RA, 9-27 Marshall KSS, 10-11 St. Louis KE; late south 9-11 Anoka KL, 10-7 Chisago RJ, 10-14 Nicollet JCF.
1979Winter An individual photographed in Carlton Co. 12-28 (JL), provides the first documented winter record for this species in the northern half of the state and is one of very few winter records for the entire state.
1980Spring Early south 4-13 Blue Earth JCF, 4-17 Sherburne JH, 4-22 Wright DCF; early north 4-20 St. Louis DA, 4-24 Becker TNWR, Marshall ANWR.
1980Summer Breeding reported from Lake, Aitkin, Beltrami; seen also throughout the state except south of the Minnesota River in the South Central and Southeast Regions.
1980Fall Late north 9-14 Itasca TL, 10-4 Cass NH, 10-15 Duluth RJ; late south 8-31 Watonwan JEB, 9-20 Sherburne OJ, 10-4 Nicollet JCF. IBIS (sp?) 10-10 Lyon, B. Meyer & T. Van Moer fide KE.
1981Spring Early south 4-17 Martin BL, 4-21 Lyon HK, 4-24 Stearns NH; early north 4-17 Duluth JG, 4-29 Aitkin DB and Otter Tail GMO, 5-1 Lake of the Woods TA.
1981Summer Declining number of reports -seen in 19 counties mostly in the northern regions.
1981Fall Late north 8-18 Cook KMH, 9-9 St. Louis KE, 9-13 Pine RJ (2); late south 10-3 Nicollet JCF.
1982Spring Early south 4-11 Houston JPI AM, 4-21 Rice KJ, 4-24 Jackson BL; early north 4-18 Aitkin WN, 4-23 Mille Lacs CF / KB, 4-27 Marshall ANWR and St. Louis KE. ;
1982Summer Seen in 27 counties in all regions except the Southeast and South Central. More reports than last year.
1982Fall Late north 8/28 Marshall MH, 9/1 Lake SWIMS, 9/12 Roseau KSS; late south 9/22 Hennepin SC, 10/14 Nicollet JCF, 11/1 Steams NH.
1983Spring Early south 4/19 Stearns NH, 4/22 Lac qui Parle JD, 4/24 Murray DGW; early north 4/21 Mille Lacs MLWMA, 4/23 Beltrami JP, 4/26 Marshall ANWR.
1983Summer Breeding data from Marshall, Aitkin, St. Louis. Seen in 18 other counties in all regions except the Southeast.
1983Fall Late north 9/25 Cook SL, 10/4 Lake of the Woods AJ, 10/30 Otter Tail OS; late south I 011 Nicollet JCF, 11/6 Stearns NH.
1984Spring Early south 4/23 Nobles SWIMS, 4/21 Watonwan SSt, 4/29 Lac qui Parle PL, Ramsey BL; early north 4/19 Cook EH, Marshall ANWR, 4/20 Mille Lacs MLWMA.
1984Summerseen in 19 counties.
1984Fall Late north 9/23 Aitkin WN, 11/14 Marshall ANWR, 11/19 Mille Lacs MLWMA ; late south 9/18 Nicollet JCF, 10/13 Dakota DB.
1985Spring Early south 4/14 Hennepin TTu, 4/18 Olmsted JEB, 4/26 Lac qui Parle FL; early north 4/13 Aitkin WN, 4/15 Mahnomen MHa, 4/17 Marshall ANWR.
1985Summer Nested in Aitkin. Also seen in Lake, St. Louis, Clearwater, Beltrami, Roseau, Marshall, Pennington, Mahnomen, Becker, Steams, Pope, McLeod, Meeker, Wright, Kanabec, Houston.
1985Fall North 91l Clearwater AB, Otter Tail DS, 9/21 Aitkin WN ; south 9/6 Chippewa RGJ, 9/21 Cottonwood RJ, I0122 Hennepin DZ.
1986Spring Early south 4/20 Brown AB, 4/25 Ramsey KB, Swift RH; early north 4/16 Marshall ANWR, 4/21 St. Louis SWIMS, 4/24 Wilkin GAM.
1986Summer Seen in 26 counties in all regions but the southeast; most common in the northern regions.
1986Fall Late north 9/13 Carlton AB, 9/23 Lake MH, St. Louis SS; late south 8/29 Brown JS ; 10/17 Hennepin ES.
1987Spring Early south 4/4 Watonwan ED, 4/24 Pipestone JP, 4/25 Lac qui Parle TBB; early north 4/18 Aitkin WN, 4/22 Marshall ANWR, St. Louis SWIMS.
1987Summer Nested in St. Louis. Also seen in ten other counties in northern regions plus Traverse, Murray, Nicollet, Isanti; less widespread than in the past.
1987Fall Late north 9/3 Marshall IT, 9/20 Itasca AB, 10/10 Aitkin WN; late south 9/7 Washington TBB, 10/3 Hennepin IT.
1988Spring Early south 4/22 Hennepin DB, 4/25 Big Stone TBB, 4/28 Cottonwood ED, BF and Renville FE; early north 4/10 Cook WD, 4/24 Aitkin WN, 4/27 Duluth BP.
1988Summer Relatively few reports; seen in 12 counties in the north plus Anoka, Washington, Waseca (AB).
1988Fall North 8/5 St. Louis CO, 10/16 Aitkin WN; south 9/25 Scott fide AP, 9/30 Nicollet JF, 10/4 Chippewa AB ; only reports.
1989Spring Early south 5/1 Hennepin SC, 5/5 Houston AP, 5/7 Goodhue AB; early north 5/3 Becker BK, Marshall SKS, 5/9 Beltrami DJ, KB.
1989Summer Seen in 15 counties throughout the north plus Lac qui Parle, Ramsey, Rice, Blue Earth.
1989Fall Late north 8/9 Clearwater PS, 8/12 Marshall AP, 10/8 Cook OSL: late south 9/15 Hennepin DC, 10/7 Anoka DS, 10/20 Rice AP.
1990Spring Early south 4/27 Olmsted JB, BSE, 5/2 Steele KV, 5/5 HennepinAB, OJ; early north 4/19 Beltrami DJ, Otter Tail SDM and St. Louis KE.
1990Summer Observed in 18 counties as far south as Lac qui Parle, Meeker, Hennepin; plus Faribault GS.
1990Fall Late north 8/9 Koochiching RJ, 8/25 Grant RJ, 9/14 Clay MO; late south 9/9 Anoka GP, 9/15 Rice TB, OR, 9/30 Washington DS.
1991Spring Early south 4/10 Blue Earth LF, 4/26 Lac qui Parle CMB, 4/29 Winona AP; early north 4/4 (earliest date on record) Becker DEB, 4/14 Aitkin WN, 4/26 Cook KMH.
1991Summer Most reports since 1986. Nested in Polk DBl; seen in 24 other counties as far south as Watonwan BB, RJ.
1991Fall Late north 8/25 Carlton AB, 9/7 Aitkin WN, 9/14 Roseau MO; late south 10/12 Hennepin DZ, 10/22 Swift AB, 11/3 Cottonwood ED.
1992Spring Early south 4/18 Big Stone DO, 4/19 Mower JM, 4/22 Le Sueur EK; early north (4/27 Cook SOL), 5/2 Aitkin WN, 5/3 St. Louis SS.
1992Summer Observed in 19 counties as far south as Lyon, Rice.
1992Fall Late north 9/20 Clay LCF, 10/10 Cook SOL, 10/13 Lake DPV; late south 8/7 Yellow Medicine HK, 8/16 Lac qui Parle CM, 8/23 Chisago KB.
1993Spring Early south 4/10 Lac qui Parle DO, 4/22 Pipestone ND, 4/28 Rice TB. Early north 3/29 Becker BBe, 4/21 Aitkin WN, 4/28 Itasca TS.
1993Summer Reported in 15 northern and central counties plus Lyon, Nicollet, Rock, Cottonwood.
1993Fall Reported 8/6 Mille Lacs DB, 8/15 Jackson KB, 8/22 Becker KB, 10/11 Aitkin WN, 10/1 Martin BBo.
1994Spring Early south 4/10 Lac qui Parle FE, 4/16 Fillmore JBo, CS, JS, Freeborn RJ and Lincoln DN; early north 4/18 Roseau KB, 4/19 Aitkin WN, 4/22 Becker BBe.
1994Summer Fewest reports in 14 years. Nested in Morrison SM; seen in 13 other counties as far south as a line through Lyon, McLeod, Anoka.
1994Fall Reported 8/26 Beltrami DJ, 9/7 Hennepin SK, 9/11 Aitkin WN, 9/26 Olmsted JW, 10/10 Crow Wing DS.
1995Spring Early south 4/26 Hennepin TT, 4/29 Olmsted CK, 4/30 Cottonwood ED; early north 3/19 (earliest date on record) Becker BBe, 4/19 Aitkin WN, 4/22 Mille Lacs PJ.
1995Summer Observed in 18 northern counties plus Anoka.
1995Fall Reported in six north and five south counties.
1996Spring Reported from 25 counties. Early south 4/23 Anoka OJ and Waseca JZ, 4/25 Washington JF. Early north 4/27 (only April date) Aitkin CB. Later than average arrivals for both south and north.
1996Summer Seen in 20 counties as far south as Cottonwood, Winona.
1996Fall Seen in six north and four south counties. Late north (median 10/8) 10/10 Aitkin DN, 10/15 Marshall SKS. Late south 10/8 Anoka KB.
1997Spring Reported from 8 south and 12 north counties. Early south 4/5 Hennepin TT and Dodge THF. Early north 4/26 Wadena PBi, 4/27 Aitkin WN, 4/28 Kanabec CM.
1997Summer Reported in 13 counties as far south as Yellow Medicine, Ramsey; plus 6/17 Houston KB.
1997Fall Only reports: 8/10 Cook OSL and Lake DV, 8/20 St. Louis TW, 8/30 Aitkin WN, 9/29 St. Louis JN, 10/17 Olmsted BE.
1998Spring Reported from 23 counties. Peak 5/9 Carlton (6) PS.
1998Summer Seen in 11 northern counties plus Anoka, Freeborn; probable nesting in Aitkin.
1998Fall Reported from only six counties. Late south 10/23 Cottonwood ED, 11/1 Swift ABo.
1999Spring Arrived seven to ten days later than usual throughout the state, except for April reports in Aitkin Co. and in the northeast region. Early south 4/23 Kandiyohi RJF, 4/24 Hennepin SC and Lac qui Parle NWi. Early north 4/16 Carlton LW, 4/24 St. Louis SS, 4/27 Aitkin WN.
1999Summer Observed in 19 counties as far south as Lyon, Freeborn, Winona; unreported in the central region.
1999Fall Only eight reports. All north reports after August: 9/5 Wadena PBi, 9/23 Aitkin CB, 10/2 Aitkin WN, 10/6 Cook KMH. All south reports: 9/10 Hennepin RH, 9/30 Freeborn ABa, 10/29 Lac qui Parle BOl.
2000Spring Observed in 10 south and 14 north counties statewide, except none in southwest region. Early south 4/12 Hennepin TT, 4/15 Scott ABo. Early north 3/21 (second earliest date) Becker BBe, 4/19 Morrison WB, 4/21 in Cass, Carlton.
2000Summer Reported in 11 north counties plus Meeker, Freeborn.
2000Fall Ten reports total, compared to eight last fall. Six September observations preceded 10/3 Becker fide BAB, 10/22 Aitkin (2) WEN and Rice JGL, 10/28 Chippewa ABo.
2001Spring Observed in 12 south and 18 north counties, but only Mower in Southeast, and Cottonwood and Jackson in Southwest. First reported 4/25–28 from five south counties. Early north 4/22 Wilkin CRM, 4/27 Roseau KJB and Kanabec CAM.
2001Summer Observed in 13 Northwest, North-central, and Northeast counties plus Morrison, Meeker, McLeod, Hennepin; also 7/24 Freeborn AEB.
2001Fall Reported from 12 counties. Late north 10/12 Aitkin PEJ, no others in October. All south reports: 8/6 Meeker RJS, 11/6 Waseca JEZ.
2002Spring Reported from 17 south and 17 north counties. Early south 4/21 Goodhue (only report from Southeast region) PHS, 4/22 Lyon RWS. Early north 4/20 Aitkin PSP, 4/29 Carlton LAW.
2002Summer Observed in 20 counties scattered throughout the state.
2002Fall Reported from five north and nine south counties. Late north 9/29 Aitkin WEN. Late south 10/26 Jackson BRB, only October report.
2003Spring Reported from 26 south and 14 north counties, but only Goodhue in Southeast. Early south 4/23 Isanti JJS, 4/24 Redwood JJS. Early north 4/23 St. Louis JRN, 4/26 Aitkin WEN.
2003Summer Most reports since 1991. Observed in 23 counties as far south as a line through Lac qui Parle, McLeod, Carver, and Anoka; plus 6/8 Freeborn AEB.
2003Fall Reported from six north and six south counties. Late north 10/2 St. Louis SLF, 10/18 Wilkin fide JMJ. Late south 10/5 Sherburne PLJ.
2004Spring Reported from 19 south and 19 north counties, but only Mower in Southeast. Early south 4/19 Steele JJS and Lac qui Parle BJU, 4/24 McLeod RWS and Hennepin WCM. Early north 4/9 Otter Tail EJE, 4/19 Clay RBJ, JEB.
2004Summer Reported from 20 counties in all regions of state except South-central, Southeast.
2004Fall Reported from six north and six south counties. Late north 9/18 St. Louis SLF. Late south 10/12 Big Stone PHS.
2005Spring Observed in 12 south and 20 north counties; none in Southeast and only Murray in Southwest. Early south 4/17 Steele KV, 4/19 Brown BTS. Early north 4/15 Becker fide JMJ, 4/16 St. Louis SLF, ALE and Wilkin CRM et al. High count 5/4 Aitkin (9) WEN, MMc.
2005Summer Reported from 20 counties in all regions of state except South-central, Southeast. Highest reported count 6/15 Itasca (20) DRM.
2005Fall Reported from eight north and three south counties. Late north 9/23 St. Louis MTA, 10/18 Clay JEB (median 10/9). Late south 9/14 Ramsey EEO (median 10/17).
2006Spring Reported from 23 south and 19 north counties in all regions. Early south 4/6 Meeker DMF, 4/9 Lac qui Parle BJU (median 4/20). Early north 4/11 Marshall (Agassiz N.W.R.) MA, 4/14 Pine MTh (median 4/18).
2006Summer Seen in 34 counties in all regions except South-central, Southeast. First nesting record for Kanabec LBF.
2006Fall Observed in nine north and eight south counties. Late north 10/29 Cook JWL, 11/2 Polk DAY (median 10/9). Late south 9/15 Lac qui Parle PBB, 9/17 Brown BTS (median 10/17).
2007Spring1219 Early south 4/10 Big Stone BJU, 4/13 Rice TFB (median 4/19). Early north 4/18 Marshall fide JMJ, 4/25 St. Louis fide JWL (median 4/18).
2007Summer169 Reported from all regions of the state except South-central and Southeast.
2007Fall76 Late north 9/17 Marshall fide JMJ, 9/19 St. Louis SLF (median 10/10). Late south 9/29 Le Sueur DAB, RMD, JWH, 10/1 Houston RBW (median 10/15).
2008Spring1620 Early south (median 4/19) 4/16 Faribault WAF, Hennepin DDo, 4/22 Lac qui Parle BJU. Early north (median 4/18) 4/18 St. Louis LAW, 4/24 Morrison RBJ, DAC.
2008Summer1211 Reported from all regions except Southwest, Southeast.
2008Fall63 Late north 8/31 Marshall PHS, 9/5 Itasca EEO. Late south 10/1 Lac qui Parle BJU (median 10/15).
2009Spring2014 Early south (median 4/18) 4/16 Nicollet RMD, 4/19 Anoka DFN. Early north (median 4/18) 4/3 Marshall JMJ, 4/16 Aitkin PEJ. High counts 5/6 Anoka (7, Carlos Avery W.M.A.) PEB, 5/18 Swift (7) WCM.
2009Summer177 Found in all regions except Southwest, Southeast.
2009Fall55 All north reports: 8/1 Aitkin ASc, 8/6 Marshall JMJ, 8/7 Itasca EEO, 9/7 Hubbard DCH, 9/14 St. Louis CRM, 10/16 Aitkin PEJ. All south reports: 8/3 Meeker DMF, 8/8 Nicollet ChH, 8/10 Jackson CRM, 8/23 Hennepin TM, 9/12 Big Stone PHS.
2010Spring2215 Early south (median 4/18) 4/1 Lac qui Parle BJU, 4/9 Nobles BTS, 4/17 Houston TPr, 4/20 Rice TFB. Early north (median 4/18) 4/9 Lake of the Woods †SSc, 4/17 Marshall MA, 4/19 Koochiching DGr, 4/20 Lake JWL.
2010Summer199 Found throughout state except for southern regions.
2010Fall64 All north reports: 8/1 Aitkin KCR, 8/2 Lake JEl, 8/2–9/6 Marshall m.ob., 8/4 Polk fide JMJ, 8/18 Aitkin KCR, 9/1 Wadena DBM, 9/12 Cass DAY. All south reports: 8/4 Lac qui Parle BJU, 8/12 Swift BJU, 8/20 Carver JCy, 9/4 Big Stone BJU.
2011Spring2119 Early south (median 4/18) 4/5 Rice TFB, 4/9 Swift KRE, m.ob., 4/11 Lac qui Parle BJU. Early north (median 4/18) 4/12 Marshall MA, 4/23 Traverse JOJ, 4/24 Kittson TrB. High counts 5/28 Lyon (8) RJS, 4/24 Lac qui Parle (7, Florida Creek W.M.A.) BJU, 5/20 Aitkin (6) ASc.
2011Summer189Observed in all regions except Southeast and South-central.
2011Fall68 All north reports 8/20 Grant BJU, 8/21 Traverse BJU, 8/24 Grant (North Ottawa Impoundment) RBW, 8/27 Marshall (near Warren), Polk HHu, 9/3 Marshall m.ob., 9/7 Lake (2, Two Harbors Airport) RBW, 9/10 Aitkin PEJ. All reports south 8/1–9/19 Big Stone BJU, 8/2 Washington DaR, 8/3–10/15 Lac qui Parle BJU, DLP, 8/20 Swift BJU, 8/29 Chippewa (Chippewa Prairie) BJU, Hennepin (2, Breck School) DaS, 9/5 Sherburne (Sherburne N.W.R.) StB, 9/17 Stevens DPG, 10/16 Swift (Lubenow W.P.A) WCM.
2012Spring2113 Early south (median 4/18) 4/12 Lac qui Parle BJU, 4/18 Rice TFB, 4/21 Anoka DWK. Early north (median 4/18) 4/8 Wadena PJB, 4/11 Itasca SC, Marshall fide JMJ, 4/14 Douglas JPE, Kanabec RAE. High count 5/19 Marshall (11, Agassiz N.W.R.) JVe.
2012Summer237 Reported from all regions except Southwest and Southeast.
2012Fall98 High count 8/24 Grant (6, North Ottawa Impoundment) KRE. Late north 9/7 Pine PRH, 9/14 Grant HHD, RAE, 10/18 Aitkin PEJ (median 10/8). Late south 10/1 Big Stone DLP, 11/8–10 Carver (Lake Waconia) JCy, CRM, GJa (median 10/10).
2013Spring1616 Early south (median 4/18) 4/16 Rice TFB, 4/21 Dakota BAF, Fillmore MMo, 4/25 Houston JEB, Nicollet RAE. Early north (median 4/18) 4/16 Mille Lacs ToL, 4/26 Pine JMP, 4/29 Marshall fide JMJ.
2013Summer2513 Reported from all regions except South-central, Southeast. First county breeding record for Kittson AXH.
2013Fall105 Late north 9/12 Cass BAW, Lake AXH, 9/24 Hubbard MAW, 9/26–27 Traverse DLP. Late south 8/28 Faribault JSn, 9/11 Steele RAE, 11/16 Lac qui Parle (possibly sick or wounded, as when it was approached it flew a short distance and crash landed) FAE.
2014Spring2328Early south (median 4/18) 4/11, 4/20 Hennepin (4, Elm Creek P.R.) LWn, 4/20, 4/22 Rice TFB. Early north (median 4/18) 4/25 Becker RAE, Douglas JPE, 5/3 Roseau BWF, St. Louis ALo, BMu. High count 5/29 Polk (11, Burnham Creek W.M.A.) VLa.
2014Summer178Found in all regions of state except Southwest, Southeast.
2014Fall1411 High count 8/30 Roseau (8) KRE, m.ob. Late north 9/2 Marshall (Agassiz N.W.R.) JLK, 9/7 Mahnomen JMJ, 10/25 Aitkin JPR (median 10/8). Late south 10/16 Big Stone DLP, 10/17 Hennepin (Hillside Cemetery, Minneapolis) ph. TBo, 11/5 Blue Earth (found in a parking lot in Mankato, injured or sick?) ph. NFT (median 10/10).
2015Spring1215 Early south (median 4/18) 4/13 Rice TFB, 4/29 Anoka DWK, 5/3 Sherburne ToL. Early north (median 4/18) 4/17–23 St. Louis JMa, JLK, 4/19 Kanabec MJB. High count 4/29 Anoka (8, Carlos Avery W.M.A.) DWK.
2015Summer1912 Found in all regions except Southwest, Southeast. First county breeding record for Big Stone KeM.
2015Fall99 High counts 8/6 Roseau (2) RAE, 8/14 Chisago (2) CRM, m.ob. Late north 8/29 Aitkin PEJ, 9/1 Becker (Hamden Slough N.W.R.) ASM, 9/5–6 Roseau LS, HHD, m.ob. Late south 9/30 Dodge (Iron Horse Prairie) JnS, 10/5 Scott (Murphy-Hanrehan P.R.) RMD, SC, 10/18 Steele JWH. [Corrected]
2015Winter1 First January record for the state: 1/1–5 Steele (84th Avenue near 50th St., Owatonna, in open-water drainage ditch) ph. KDR, ph. †PEB, m.ob., numerous photos. The bittern appeared healthy and was seen in flight by several observers.
2016Spring2533 Early south (median 4/16) 4/4 Le Sueur DWK, 4/11–23 Dakota (180th St. Marsh) RWh, CRa, ADS, 4/12 Dakota (Hastings S.N.A.) AlF. Early north (median 4/17) 4/17 Aitkin SNe, 4/26 Crow Wing EGa, 4/28 Itasca SC. High counts 5/8 Sherburne (6, Sherburne N.W.R., Wildlife Drive) ABm, 5/21 St. Louis (6, Duluth) NWi, 5/24 Marshall (6, Agassiz N.W.R.) KnM.
2016Summer1917 Found in all regions except Southeast.
2016Fall1113 High counts 9/4 Hennepin (6, Minnesota Valley N.W.R., Bass Ponds) KvM, 8/7 Cass (4, Walker) BKe. Late north 9/9 Pine LEv, 9/14 Cook RRd, RRe, 10/17 Polk SAu (median 10/8). Late south 10/9–10 Brown RAE, BTS, MiO, 10/16 Blue Earth (location?) APi, ChH, 10/18 Blue Earth (Lake Crystal) STa, 10/27 Big Stone DLP (median 10/16).
2017Spring2937 Early south (median 4/13) 4/4 Rice TFB, 4/7 Cottonwood (2) KEm, 4/8 Rice TFB, 4/9 Dakota FKB. Early north (median 4/17) 4/14 Koochiching AMe, 4/15 Grant (max. 6, season high count, North Ottawa Impoundment) ToL, CEl, LiH, DWK, Kittson LW, Lake JoT.
2017Summer2321 Found in every region except Southeast. High counts 6/21 Hennepin (8, Elm Creek P.R.), 7/6 Grant (7, North Ottawa Impounment) GHo, KDS.
2017Fall915 High count only 3, at the North Ottawa Impoundment in Grant. Late north 10/10 Grant DOr, 10/17 Wilkin KnM (median 10/8). Late south 10/9 Lyon (2) GWe, 10/13 Redwood KRE, m.ob. (median 10/16).
2018Spring2644 Early south (median 4/13) 4/10 Rice TFB, 4/12 Hennepin ebd, Ramsey ebd. Early north (median 4/17) 4/25 Aitkin EGa, 4/28 Pine JCC, 4/30 Lake of the Woods ebd. High count 5/13 Anoka (14, Carlos Avery W.M.A.) RMD, ELC.
2018Summer2026 Found in every region. First county breeding record 6/29 Cook AB.
2018Fall1221 Late north 9/27 Itasca SC, 9/28–30 Grant (4, season high count, North Ottawa Impoundment) RAE, CRa, m.ob., 10/2 Grant (location?) DFe (median 10/11). Late south 9/28 Dakota MwT, Murray (2) KEm, Sherburne MLk, 9/29 McLeod BHa, 10/7 Dakota MwT (median 10/16).
2019Spring2840 Early south (median 4/13) 4/13 Lyon NMe, 4/14 Anoka BKn, Dakota AJF, Washington GJa. Early north (median 4/17) 4/20 Wilkin KRE, m.ob., 4/26 Pine (2) KrM. High count 5/13 Blue Earth (6, Lincoln W.P.A.) BDo, m.ob.
2019Summer2524 Found in all regions. High count 6/1 Grant (7, North Ottawa Impoundment) WPl.
2019Fall1110 Highest counts only three. Late north 9/15 Clay CMk, 9/19, 10/19–20 Grant (North Ottawa Impoundment) WPl, m.ob. (median 10/8). Late south 9/15 Sherburne ebd, 10/17 Jackson KEm, 10/23 Dakota DVe (median 10/16).
2020Spring2429 Early south (median 4/13) 4/5 Wabasha ASu, 4/11 Hennepin JQn, Kandiyohi JoS, Redwood RJS. Early north (median 4/17) 4/19 Traverse ebd, 4/21–24 St. Louis (max. 2) JLK, m.ob., 4/24 Aitkin (4) JGz, Cass DAY, Pine KrM. High counts 5/12 Aitkin (9, McGregor Marsh) JGz, PSk, 5/23 Wilkin (7, Meadows W.P.A.) AaL.
2020Summer1816 Reported from all regions except Southeast.
2020Fall1110 Highest count only two. Late north 9/19 Kittson ebd, 10/10 Douglas JPE, Morrison AaL, m.ob. (median 10/8). Late south 10/7 Olmsted JPr, m.ob., Ramsey MRe, WRe, 10/8 Sherburne ebd, m.ob., 10/29 Hennepin ebd (median 10/16).
2021Spring2725 Early south (median 4/13) 4/10 Kandiyohi REn, RLF, 4/16 Steele ebd, 4/18 Anoka ebd, Hennepin ebd. Early north (median 4/17) 4/6 Cass ABi, 4/16 Pine ebd, 4/18 Beltrami ebd. High counts 5/30 Marshall (6, Agassiz N.W.R.) TWe, BWe, 5/18 St. Louis (4, Mud Lake) JLK.
2021Summer2318 Found in all regions, though most common in the North. High count 6/18 Koochiching (7, Tom Cod Bay) ebd.
2021Fall1216 High count 8/6 Wright (3, Pelican Lake) DPG. Late north 9/8 Crow Wing ebd, 9/19 Cass ebd, 10/9 Marshall ebd (median 10/11). Late south 10/3 Hennepin HPe, MyP, Ramsey LAt, 10/5–6, 10/20 Lac qui Parle ebd, DLP (median 10/17).
2022Spring3033 Early south (median 4/13) 4/16 Lyon GWe, 4/21 Anoka BKn, 4/23 Hennepin RTu. Early north (median 4/18) 4/24 St. Louis JLK, 5/3 Beltrami ebd, Cass ebd. High count 5/18 Isanti (6) ANy.
2022Summer2127 Encountered in all regions.
2022Fall1512 Highest counts only two. Late north 9/10 Aitkin DoH, m.ob., 9/10–18 Itasca ebd, 10/14 Otter Tail (2, Haiby W.P.A.) TkL (median 10/11). Late south 10/2 Hennepin (Minnesota Valley N.W.R., Bass Ponds) ebd, Yellow Medicine GWe, 10/8 Steele PSu, 11/21 Hennepin (Minnesota Valley N.W.R., Bass Ponds) KOC, m.ob. (median 10/17).
 
 Breeds mostly north and 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.