Quiscalus mexicanus

Status:  Common regular spring and fall migrant southeast and south-central, uncommon elsewhere. Common regular breeder south-central and southeast, uncommon western Sandhills, rare elsewhere. Uncommon regular winter visitor south and east, rare casual elsewhere.

Documentation:  Specimen: UNSM ZM17601, May 1998 Ceresco, Saunders Co.

Taxonomy:  Eight subspecies are recognized (Pyle 1997), five south of the USA and these north of Mexico: nelsoni, breeding and wintering from southeast California to southern Nevada and southwest Arizona, monsoni, breeding and wintering from southern Utah and southern Colorado to south-central Arizona and southwest Texas, and prosopidicola, breeding and wintering from southeast Nebraska to south Texas and Louisiana.

The measurements of the specimen cited above (Tom Labedz, pers. comm.) are somewhat intermediate between monsoni and prosopidicola; the tail is long for prosopidicola. Faanes and Norling (1981) collected an adult male in Buffalo Co 13 Jun 1979; they concluded the specimen was referable to monsoni by measurements, although, as with the Saunders Co specimen cited above, the measurements could also be considered intermediate. This specimen appears to be lost (Bray et al 1986).

All specimens taken to date in northwest Missouri, where the first nesting was recorded in 1979, have been of the eastern race prosopidicola (Robbins and Easterla 1992). Subspecies of Great-tailed Grackle merge clinally at range boundaries and it might be concluded that the Nebraska specimens are intergrades of prosopidicola and monsoni. All three subspecies are expanding their ranges northward at an “explosive” rate (Jaramillo and Burke 1999).

Changes since 2000: Although this species first nested in Nebraska as recently as 1976, it has continued to expand its range. Since 2000 it has bred almost throughout, including the western Sandhills, western Loup River drainage, and the Panhandle, and is now a regular wintering species in the Platte River Valley.

Spring:  Feb 13, 13, 18 <<<>>> summer

Most migrants arrive in late Feb and early Mar; northward movement is detectable by late Feb from the Platte River Valley winter range. Away from the winter range, reports in the central and west begin in Mar; earliest are: 15 Mar 2016 Garfield Co, 17 Mar 2007 Scotts Bluff Co, and 12 on 24 Mar 2016 Thomas Co.

During Apr-Jun there is a gradual move north, probably more so a spring dispersal, as far as Cherry Co; notable reports for the years given or early arrival dates in this period are: 28 Mar 2016 Valentine, Cherry Co, 23 Apr 1988 Rock Co, four on 27 Apr 2009 Boyd Co, 2 May 2009 Smith Lake WMA, Sheridan Co, 6 May 1996 Grant Co, 15 May 2010 Rushville, Sheridan Co, three on 16 May 2005 Fort Niobrara NWR, Cherry Co, 14 Jun 2009 Rock Co, 19 Jun 2012 Holt Co, and 19 Jun 2015 NNF McKelvie, Cherry Co.

  • High counts:  525 in Hall Co 13 Feb 2016, 400 near Doniphan, Hall Co 21 Feb 2020, 300 at a Grand Island truck stop 11 Mar 2018, 250 in Scotts Bluff Co 6 Mar 2013, and 250 in Lincoln Co 29 Mar 2020.

Summer: This species was first recorded in Nebraska in 1976 in Phelps Co, when several birds were seen in spring and summer around the headquarters of the Sacramento-Wilcox WMA; nesting was suspected but not confirmed (Longfellow 1979). There are extensive pine (Pinus spp.) and juniper (Juniperus spp.) plantings in this area.

Breeding in Nebraska is usually associated with wetlands, especially cattail (Typha spp.) marshes, and it has been suggested that “wet habitat types may be important for pioneering birds” (Faanes and Norling 1981). However, the first Nebraska nestings were in dense spruces in a park-like setting (Cortelyou 1977a, 1977b, 1978), a habitat which is most often utilized within the species’ core range (Pruitt and McGowan 1975).  It also nests regularly in high traffic urban areas such as at various locations along Cornhusker Highway in Lincoln, Lancaster Co and in small ornamental trees adjacent to restaurants and convenience stores at the York, York Co Interstate 80 interchange.  An unusual observation from 2019 involved Great-tailed Grackles apparently using corn stalks from the previous growing season in standing water as nesting sites west of Hansen WPA, Clay County in May and June (Jorgensen and Brenner 2019).

The second and third records involved confirmed nesting.  At the Hastings Ammunition Depot in Adams Co several pairs were seen in spruces near the Officers’ Club from 11 May 1977 into summer (Williams 1977, Cortelyou 1977a, 1977b). About 10-15 pairs were later counted, with at least six young present. It was believed by the observers that birds may have been at this site for two or three years; an impressive tally of 100+ birds were there 21 May 1978 (Cortelyou 1978). At the same time a small colony with two nests was found 14 May 1977 in a clump of willows in a small lake at Boystown, Douglas Co (Williams 1977, Cortelyou 1977a, 1977b); at least four males and two females were present through early Jul.

Since 1977, nesting has been regularly reported in southeast Nebraska, with most reports from the Rainwater Basin.  Mollhoff (2001) showed breeding season reports only in the southeast during 1984-1989, north to Lancaster and Howard Cos and west to Phelps Co, but by 2006-2011, scattered reports extended over most of the state (Mollhoff 2016). Range expansion has followed major river valleys westward along the Platte and North Platte River Valleys and the Loup River drainage into the western Sandhills.  Confirmed breeding was recorded in the 2006-2011 BBA period in Dawes, Box Butte, Sheridan, Garden, and Grant Cos, as well as Deuel, Lincoln, and Dawson Cos, all northwest of the 1984-1989 range. As of 2016, fewest reports are from the northeast.

  • Breeding phenology:
    Courtship: 28 Mar
    Copulation: 16-30 Apr
    Nest building: 4 Apr-28 May
    Eggs: 25 Apr-7 Jul
    Nestlings: 4 May- 21 Jun
    Fledglings: 8 Jun-4 Aug

Fall: Flocks form in Jul and can be large by early Aug; examples are 150 at Kissinger Basin WMA, Clay Co 2 Aug 2003 (Jorgensen 2012), 115 in Otoe Co 21 Aug 1998, and 65 at Ong, Clay Co 20 Aug 1994.

There is a southward movement detectable from the north during Jul-Aug, by Sep most birds are in the south half of the state, and all are essentially within the Platte River Valley winter range by Oct. A late date in the north was of eight in Wheeler Co 28 Oct 2018. Migration probably peaks in Oct; large flocks occur Sep-Nov (see High Counts).

Outside the breeding range, fall reports are rare. Thus, a series of reports of large flocks in the marshes near Niobrara, Knox Co 22 Nov-16 Dec 1998-2003 was notable; highest count was 127 on 23 Nov 2001. A flock of 52 was at Oliver Reservoir, Kimball Co 2 Feb 2018.

  • High counts:  300 at Weis Lagoon, Fillmore Co, 18 Sep 2001, 300 in Hall Co 5 Nov 2014, 250 at Cozad, Dawson Co 22 Oct 2020, 200 in Sarpy Co 27 Nov 1997, 200 at Mallard Haven, Clay Co, 24 Sep 2003, and 200 in Lincoln Co 27 Nov 2015.

Winter: The first reports of overwintering were in Lincoln, Lancaster Co in 1985-86 (Williams 1986) and in 1995-96, when up to 32 wintered at Oak Park Lake, Lincoln, Lancaster Co and 9 Feb 1999 when 14 were there. From 2000 to 2010 Great-tailed Grackles over-wintered in Grand Island, Hall Co, Hastings, Adams Co, and Minden, Kearney Co; 72 were near Grand Island 31 Jan 2004. A flock of 150 present at North Platte, Lincoln Co for two weeks prior to 27 Feb 2006 was said to have “pretty much wintered” there. Since 2010, there has been a trend of sizeable groups wintering in larger southern cities; in 2011-2012, 135 wintered in Lincoln, and in 2012-2013, 80 were in Hastings, 125 in North Platte, and 60 in Grand Island. North Platte hosts a flock of around 150 each winter, 160 were in Lexington, Dawson Co 16 Jan 2019, 330 were in Grand Island 6 Jan 2016, and 400 near Doniphan, Hall Co 21 Feb 2020.

It is clear that as of 2017 this species has established a winter range along the Platte River Valley to Keith Co (, accessed October 2017). There are few Nov-Feb reports elsewhere, including the Republican River Valley. Reports away from the winter range mapped above are few: three on 17 Nov 2006 Scotts Bluff Co, up to 13 from 2 Dec 1999-15 Jan 2000 Clear Creek WMA, Garden Co, 31 Dec 2005 Calamus-Loup CBC, 10 on 2 Jan 2006 Beaver Valley CBC, seven on 4 Jan 2002 Boone Co, nine on 14 Nov 2016 Madison Co, 10 on 25 Jan 1998 Knox Co, four on 6 Feb 2004 Norfolk, Cuming Co, 11 Jan 2009 Dodge Co, and 25-26 at Alma, Harlan Co through 5 Feb 2006.

Comments: Earliest county dates and nesting records other than those given above for Phelps, Adams, and Douglas Cos, 1976-77, are listed in Sharpe et al (2001). Since 2000, there are these additional records. An adult female was feeding large begging young south of Morrill, Scotts Bluff Co 20 Jul 2002.  Four adults summered at Alma, Harlan Co in 2002; adults were feeding fledged young there 13 Jul. A male was near Imperial, Chase Co 10-12 Jun 2003. Two pairs were nest-building at Smith Lake SRA, Sheridan Co 7 Jun 2004. In 2004 there were reports from Red Willow Co 27 Jul, and Hitchcock Co 16 Jun. Three were at Fort Niobrara NWR 16 May 2005. Three were in Holt Co 22 Jul 2005. Two nests were located at Crescent Lake NWR, Garden Co 21 Jun 2008. Four were in Boyd Co 27 Apr 2009. In the southwest, 1-2 were in Perkins and Chase Cos 22 Jul 2010, and one was in Dundy Co 13 Jun 2014. Two were at Oliver Reservoir, Kimball Co 17 Jun 2017.


BBA: Breeding Bird Atlas
BBS: Breeding Bird Survey
CBC: Christmas Bird Count
NNF: Nebraska National Forest
NWR: National Wildlife Refuge
SRA: State Recreation Area
UNSM: University of Nebraska State Museum
WMA: Wildlife Management Area (State)
WPA: Waterfowl Production Area (Federal)


Photograph (top) of a female Great-tailed Grackle at Straightwater WMA, Seward Co 17 May 2016 by Joel G. Jorgensen.

Literature Cited

Bray, T.E., B.K. Padelford, and W.R. Silcock. 1986. The birds of Nebraska: A critically evaluated list. Published by the authors, Bellevue, Nebraska, USA.

Cortelyou, R.G. 1977a. Great-tailed Grackles nesting in Nebraska. NBR 45: 18.

Cortelyou, R.G. 1977b. 1977 (Fifty-second) Spring Migration and Occurrence Report. NBR 45: 34-50.

Cortelyou, R.G. 1978. 1978 (Fifty-third) Spring migration and Occurrence Report. NBR 46: 66-85.

Faanes, C.A., and W. Norling. 1981. Nesting of the Great-tailed Grackle in Nebraska. American Birds 35: 148-149.

Jaramillo, A., and P. Burke. 1999. New World Blackbirds- The Icterids.  Princeton University Press Princeton, New Jersey, USA.

Longfellow, S. 1979. A 1976 Great-tailed Grackle record, and some 1979 records. NBR 46: 16.

Mollhoff, W.J. 2001. The Nebraska Breeding Bird Atlas 1984-1989. Nebraska Ornithologists’ Union Occasional Papers No. 7. Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.

Mollhoff, W.J. 2016. The Second Nebraska Breeding Bird Atlas. Bull. Univ. Nebraska State Museum Vol 29. University of Nebraska State Museum, Lincoln, Nebraska, USA.

Pruitt, J., and N. McGowan. 1975. The return of the Great-tailed Grackle. American Birds 29: 985-992.

Pyle, P. 1997. Identification Guide to North American Birds. Part I, Columbidae to Ploceidae. Slate Creek Press, Bolinas, California, USA.

Robbins, M.B., and D.A. Easterla. 1992. Birds of Missouri, their distribution and abundance. University of Missouri Press, Columbia, Missouri, USA.

Williams, F. 1977. Southern Great Plains Region. American Birds 31: 194-197.

Williams, F. 1986. Southern Great Plains Region. American Birds 40: 297-299.

Recommended Citation

Silcock, W.R., and J.G. Jorgensen.  2021.  Great-tailed Grackle (Quiscalus mexicanus). In Birds of Nebraska — Online.

Birds of Nebraska – Online

Updated 17 Jan 2021