Oxyura jamaicensis rubida
Status: Common, locally abundant, regular spring and fall migrant statewide. Locally uncommon regular breeder Sandhills, rare Rainwater Basin, rare casual elsewhere. Rare casual summer and winter visitor statewide.
Documentation: Specimen: UNSM ZM12481, 26 Dec 1912 Lancaster Co.
Taxonomy: Two subspecies are recognized by some authorities (Gill and Donsker 2017): North American birds, O. j. rubida, and those of the West Indies, O. j. jamaicensis. Others, however, consider O. j. rubida weakly differentiated (Pyle 2008, Clements et al 2016), which would result in a monotypic Ruddy Duck in North America. Since breeding ranges are distinct and migratory behavior differs between O. j. rubida and O. j. jamaicensis (Brua 2002), both important isolating mechanisms, we retain two subspecies. Nebraska birds are O. j. rubida.
One with an all-white head was at Whitman, Grant Co 14 and 20 Mar 2018; this condition is not mentioned in major waterfowl references and is probably an example of bilateral partial leucism.
Changes Since 2000: Reports of Ruddy Ducks overwintering or lingering well into Jan have increased; overwintering was first noticed at Lake Ogallala, Keith Co in 1999-2000 and at Carter Lake, Omaha, Douglas Co in 2011-2012.
Spring: Feb 17, 18, 18 <<<>>> Jun 6, 6, 9
Earlier dates are 12 Feb 1977 Howard-Hall Cos and 13 Feb 2013 Saline Co, and later dates are of two in Hitchcock Co 12 Jun 2015, and two in Sarpy Co 13 Jun 2015. Late dates are from locations where breeding was not noted. Peak numbers occur in mid-Apr.
- High counts: “thousands” at North Platte SL, Lincoln Co 21-30 Apr 2005, 742 in Lancaster Co 22 Mar 2012, 555 at Lake Ogallala 14 Apr 2001, and 548 at Branched Oak Lake, Lancaster Co 2 Apr 2013.
Summer: The highest breeding densities are found in the western Sandhills (Mollhoff 2001). Breeding also occurs irregularly in the Rainwater Basin, often in response to periods when wetlands have relatively high water (Jorgensen 2012, 2016). There are about 20 documented instances of breeding in the Rainwater Basin, as well as numerous summer reports without breeding evidence.
In the southeast, there are several breeding season reports from Lancaster and Douglas-Sarpy Cos including a male at Oak Lake, Lincoln, Lancaster Co 20 Jun 2015, a female at Pawnee Lake, Lancaster Co 21 Jul 2006, and a female in Douglas Co 29 Jul 2016. There is only one record of breeding, however; Cink (1975) reported a female with three young near Sprague, Lancaster Co 25 Jun 1972. Higher than normal water levels in the east in 2008 allowed up to seven, including five males, to summer in Sarpy Co.
Elsewhere there are several breeding season reports without evidence of breeding; such birds are probably one-year-old non-breeders, as a high proportion of Ruddy Ducks do not breed until two years of age (Baldassarre 2014). Breeding males remain on the breeding grounds until late Jul or early Aug, and do not disperse long distances for the pre-basic molt (Baldassarre 2014, Howell 2010). In Harlan Co, there are seven records 12 Jun-30 Jul including a flock of 17 probable non-breeders in basic plumage at Harlan Co Reservoir, Harlan Co 16 Jun 2000.
The North Platte SL is a favored site for apparent non-breeders: 14-20 were there 22 Jun-8 Jul 2006, 48-60 from 21 Jul-1 Sep 2000, and 96 in “all plumages” 23 Jun 2002.
- Breeding phenology:
Dependent fledglings: 14-20 Jul.
Fall: Sep 17, 20, 20 <<<>>> Jan 5, 5, 6
Migrants are evident by Sep and peak numbers occur from mid-Oct into early Nov. A few linger into late Dec, but this is not a cold-tolerant species. Unusually late high counts were the 55 at Wehrspann Lake, Sarpy Co 20 Dec 1998 and 29 at Lake McConaughy 30-31 Dec 2011.
- High counts: 1645 in Lancaster Co 5 Nov 2014, 1500 at North Platte SL 28 Oct 1996, and 1492 at Lake Minatare 16 Oct 1999.
Winter: Overwintering is rare. Lake Ogallala is a regular location; 11 wintered 1999-2000, 1-6 were there 3 Jan-6 Feb 1998, one was there 16 Dec 2001-19 Jan 2002, 6-9 were there 9-24 Jan 1999, one on 30 Jan 1972 (Cortelyou 1972), and one on 30 Jan 2015. In recent winters, Carter Lake, Omaha has hosted wintering Ruddy Ducks: 1-2 wintered 2011-2012, up to seven in 2012-13, one was there 24 Jan 2015, and a female wintered 2015-2016.
Away from those locations, there are two records of overwintering: in Sioux Co, up to 17 wintered on University Lake 1995-96 and one wintered at Holmes Lake, Lincoln, Lancaster Co 2015-2016.
Additional mid-winter records are of 15 in Howard-Hall Cos 15 Jan 1991, and singles in Lincoln Co 16 Jan 2002 and Stanton Co 2 Feb 1997.
SL: Sewage Lagoons
UNSM: University of Nebraska State Museum
Photograph (top) of a Ruddy Duck in the Central Nebraska Public Power and Irrigation Canal below Lake Ogallala, Keith Co, 24 Mar 2018 by Boni Edwards.
Baldassarre, G. 2014. Ducks, geese, and swans of North America. Johns Hopkins University Press, Baltimore, Maryland, USA.
Brua, R.B. 2002. Ruddy Duck (Oxyura jamaicensis), version 2.0. In The Birds of North America (P. G. Rodewald, editor). Cornell Lab of Ornithology, Ithaca, New York, USA. https://doi.org/10.2173/bna.696
Cink, C.L. 1975. Some waterfowl breeding records for Lancaster County. NBR 43: 40-41.
Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, accessed 30 January 2018.
Cortelyou, R.G. 1972. 1972 (Forty-seventh) Spring Migration and Occurrence Report. NBR 40: 72-86.
Gill, F., and D. Donsker (Eds). 2017. IOC World Bird List (v 7.3), accessed 30 January 2018.
Howell, S.N.G. 2010. Molt in North American Birds. Houghton Mifflin Harcourt, Boston, Massachusetts, USA.
Jorgensen, J.G. 2012. Birds of the Rainwater Basin, Nebraska. Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.
Jorgensen, J.G. 2016. A summary of 2015 breeding bird surveys of selected Rainwater Basin wetlands. Nongame Bird Program of the Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.
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.
Pyle, P. 2008. Identification Guide to North American Birds. Part II, Anatidae to Alcidae. Slate Creek Press, Bolinas, California, USA.
Silcock, W.R., and J.G. Jorgensen. 2018. Ruddy Duck (Oxyura jamaicensis), Version 1.0. In Birds of Nebraska — Online. www.BirdsofNebraska.org
Birds of Nebraska – Online