AMERICAN WIGEON

Mareca americana

Status:  Common, locally abundant, regular spring and fall migrant statewide. Rare regular breeder north-central and northwest, rare casual elsewhere. Rare casual summer visitor statewide. Rare local regular winter visitor Platte and North Platte River Valley counties southward, rare casual elsewhere.

Documentation: Specimen: UNSM ZM7676, 12 Apr 1913 Lancaster Co.

Taxonomy: No subspecies are recognized. This species was recently moved from genus Anas to genus Mareca, based on genetic studies (Chesser et al 2017).

A normal variant in male American Wigeons is the colloquially-named “Storm Wigeon”, or “White-cheeked Wigeon”, prized by hunters, that has white cheeks instead of the usual gray (Mini et al 2020). One was in Antelope Co 8 Apr 2018 and possibly the same bird was there 31 Mar 2020.

Spring: Feb 12, 13, 14 <<<>>> Jul 3, 3, 3

Early dates above are north of the winter range. The initiation of migration is coincident with the thaw of frozen rivers, lakes and ponds, typically in late Feb. Numbers peak in mid-Apr, with a few stragglers into early May and even into June. It is difficult to determine the end of spring migration as lingering at wetlands statewide into early Jul occurs often. Late dates above are away from the potential breeding range; there is a later date 6 Jul 1988 Stanton Co.

  • High counts: 2581 at North Platte NWR, Scotts Bluff Co 14 Apr 1995, 2200 at Harvard WPA, Clay Co 9 Apr 2000, and 1350 at Swanson Reservoir, Hitchcock Co 17 Apr 2002.

Summer: Currently, American Wigeon is a rare breeder in the state. Although there are few documented records of breeding, only three since the 1960s (Mollhoff 2001, 2016, Jorgensen 2012), there are numerous summer sightings in areas where breeding might occur. Most of these are in the western Sandhills in southern Sheridan, northern Garden, and Grant Cos, extending northeastward to Valentine NWR in Cherry Co. Confirmed breeding was reported by Mollhoff (2001) at Valentine NWR, Cherry Co and by Mollhoff (2016) in southeast Garden Co, and there is a single breeding record for the Rainwater Basin, a hen with a brood of 10 on 30 Jun 2001 (Jorgensen 2012).

Reports from counties adjacent to the breeding range shown in the above map that might indicate local nesting are from Scotts Bluff, Sioux, Dawes, McPherson, and Thomas Cos. There were several reports at Funk WPA, Phelps Co 1997-2001 suggestive of local nesting there.

Elsewhere, summer reports (7 Jul-24 Aug) are few: 8 Aug 2020 eight in Hall Co, 9 Aug 2017 Scotts Bluff Co, and 12 Aug 2009 Dawson Co.

Fall:  Aug 25, 25, 25 <<<>>> Nov 26, 27, 28

Late dates above are away from the winter range; later dates are 24 Nov-4 Dec 2016 Cedar Co, 1 Dec 2012 Knox Co, and 5 Dec 2018 Madison Co.

The beginning of true fall migration is evident in early Sep although 24 on 25 Aug 2006 in Keith Co and 20 on 18 Aug 2020 at Crescent Lake NWR, Garden Co were probably early migrants or possibly molt migrants. Baldassare (2014) stated that failed breeders and males begin to assemble in Jun-Jul to molt. Five reports from Lake Ogallala, Keith Co 15 Jun-27 Jul suggest this is a molt location, as it is for Common Merganser (see that species). The Rainwater Basin may also be such a site; there are 13 reports 16 Jun-22 Jul. Probable molt migrants were 10 in Harlan Co 27 Jul 2000, four in Keith Co 7 Aug 2020, and eight in Hall Co 8 Aug 2020.

Peak migration occurs Oct-early Nov, but significant numbers may persist into mid-Nov with stragglers into Dec. A late high count was the 624 at Lake McConaughy, Keith Co 30-31 Dec 2011.

  • High counts: 1670 at Lake McConaughy 15 Oct 2000, 1500 at Palmer Lake, southwest Sheridan Co 11 Nov 1994, and 1500 at Lake Ogallala 17 Oct 2015. “Thousands” were at Winters Creek Lake, Scotts Bluff Co 7 Nov 2004.

WinterSmall numbers may remain well into Dec and even Jan given open water, although wintering is regular only along the North Platte River Valley and is rare east of Dawson Co and elsewhere in the state. Notable were 1-8 wintering at Carter Lake, Douglas Co in four of the years 2011-2012 through 2016-2017. As many as 286 wintered on Lake Ogallala 1999-2000, and 100 wintered in Scotts Bluff Co 2002-2003 and 2003-2004. A Scottsbluff CBC high was the 684 there 18 Dec 2004.

Numbers are lowest 29 Nov- 11 Feb; most such records are as expected from the winter range; the few such reports prior to winter 2018-2019 were 12 Dec 2016 Dakota Co, 19-20 Dec 2018 Garfield Co, 20 Dec 2014 Madison, Co, 3 Jan 2005 three in Cedar Co,  20 Jan 2018 Cedar Co, and 10 Feb 2009 reports from two locations in Boone Co. In recent winters, such reports are increasing; in winter 2018-2019 there were reports from five locations away from the Platte River valleys including 13 at Enders Reservoir, Chase Co 14 Jan, in 2019-2020 there were four such records, including singles on Lake Yankton and Lewis and Clark Lake, both in Cedar Co, 2 Feb and in 2020-2021 seven records of singles 4 Dec-11 Feb all in the northeast.

Abbreviations

CBC: Christmas Bird Count
NWR: National Wildlife Refuge
UNSM: University of Nebraska State Museum
WPA: Waterfowl Production Area (Federal)

Acknowledgement

Photograph (top) of an American Wigeon at Retriever Marsh, Sarpy Co, 30 March 2018 by Phil Swanson.

Literature Cited

Baldassarre, G. 2014. Ducks, geese, and swans of North America. Johns Hopkins University Press, Baltimore, Maryland, USA.

Chesser, R.T., K.J. Burns, C. Cicero, J.L. Dunn, A.W. Kratter, I.J. Lovette, P.C. Rasmussen, J. V. Remsen, Jr., J.D. Rising, D.F. Stotz, and K. Winker. 2017. Fifty-eighth supplement to the American Ornithological Society’s Check-list of North American Birds. Auk 134: 751-773.

Jorgensen, J.G. 2012.  Birds of the Rainwater Basin, Nebraska.  Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.

Mini, A.E., E.R. Harrington, E. Rucker, B.D. Dugger, and T.B. Mowbray. 2020. American Wigeon (Mareca americana), version 1.0. In Birds of the World (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.amewig.01.

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.

Recommended Citation

Silcock, W.R., and J.G. Jorgensen.  2021.  American Wigeon (Mareca americana). In Birds of Nebraska — Online. www.BirdsofNebraska.org


Birds of Nebraska – Online

Updated 11 Mar 2021