Vireo bellii bellii
Status: Fairly common regular spring and fall migrant east and central, uncommon west. Common regular breeder central, fairly common east, rare west.
Documentation: Specimen: UNSM ZM10541, 12 Aug 1907 (two birds) Lincoln, Lancaster Co.
Taxonomy: There are four subspecies recognized, including pusillus, which may soon be afforded specific status as V. pusillus Least Bell’s Vireo (Gill and Donsker 2017); the other three are arizonae of Mexico, medius of southern New Mexico and west Texas, and bellii of the central and southern USA. Nebraska birds are bellii.
Spring: Apr 20,20,20 <<<>>> summer (east), Apr 24,26,27 <<<>>> summer (central), May 11,12,15 <<<>>> summer (west)
First arrivals are in the east, becoming progressively later westward, especially in the Panhandle. Kus et al (2010) noted that arrival is later at higher elevations and northward. There are earlier dates in the east of one seen and heard in breeding habitat 8 Apr 2000 at Twin Lakes, Lancaster Co, 10 Apr 1972 Brown Co, 10 Apr 1978 Lancaster Co, 11 Apr 2009 Butler Co, and 17 Apr 2017 Lancaster Co, and in the west 22-29 Apr 1967 Sioux Co, 2 May 1964 Scotts Bluff Co, and 7 May 2002 Crescent Lake NWR, Garden Co.
- High counts: 34 at Calamus Reservoir, Loup Co 24 May 1997, 23 in Chase Co around 30 May 1999, and 14 at Valentine NWR, Cherry Co 25 May 2017.
Summer: Although this species breeds statewide, it is least numerous in western Sandhills grasslands and in the Panhandle, where extensive brushy habitat is lacking; Jorgensen (2012) noted that it is also largely absent as a breeder from the Rainwater Basin because of limited habitat. However, Mollhoff (2016) showed a small number of records from this latter landscape. Overall, it is increasing in numbers; the BBS Trend analysis shows Bell’s Vireo has increased at an average rate of 4.50% (95% C.I.; 2.40, 6.62) per year statewide during the period 1966-2015 (Sauer et al 2017). BBS trend map analysis shows that increases have occurred in all areas except for the Panhandle, where there are few data. Changes in the amount and distribution of breeding habitat due to human intervention has likely attributed to local and regional increases, as the absence of disturbance regimes, such as fire, has allowed expansion of shrub habitat. Rosche (1994) noted that “inadequate stream flow” in the North Platte River channel in Keith Co has allowed dense riparian brush to return, benefitting this species in recent years. However, clearing of brush along watercourses, such as along the central Platte River, and reintroducing fire regimes tend to reduce the extent of breeding habitat.
Along the Niobrara River Valley, Kus et al (2010) depicted the range as continuous west to the Pine Ridge; it is indeed common west to NNF McKelvie, Merritt Reservoir, and Valentine NWR in Cherry Co, but between there and the Pine Ridge numbers are low; the lone two records are listed below under western Sandhills.
In the Panhandle, numbers are low. Johnsgard (1979) stated that it was absent in most of the Panhandle except for the White River Valley, and Rosche (1982) considered it rare to uncommon in the northwest, with “no nesting evidence”. Ducey (1988) however, cited breeding records for Scotts Bluff Co in 1964 and Dawes Co in 1966. On the Pine Ridge, there are these sightings: seven reports of 1-3 birds 20 May-22 Jul 2010-2016 at Fort Robinson SRA, Sioux Co, 23 May 2014 Chadron, Dawes Co, 31 May 2013 Chadron Reservoir, Dawes Co, 3 Jun 2008 Chadron SP, Dawes Co, two on 10 Jun 2015 Ponderosa WMA, Dawes Co, 1-3 on 10-11 Jun 2015 Chadron SP, one on 13 Jun 2009 in Dawes Co, and 1-2 on 19-20 Jun 2018 in Kings Canyon, Dawes Co.
In the western Sandhills and Panhandle south of the Pine Ridge, there are few breeding season reports: 7 May 2002 Crescent Lake NWR, 16 May 2015 Highway 61 at Niobrara River, Cherry Co, 21 May-8 Jun 2010 Crescent Lake NWR, 28 May 2015 Gering, Scotts Bluff Co, 29 May 2016 Scotts Bluff Co, 31 May 2016 Crescent Lake NWR, 3 Jun 2014 Gordon BBS, Sheridan Co, 25 Jun 2016 Crescent Lake NWR, 25 Jun 2016 Ash Hollow SHP, Garden Co, 15-17 Jul at four Garden Co locations (Williams 1987), 1 Aug 1966 Scotts Bluff Co, 7 Aug 1976 Scotts Bluff Co, and 8 Aug 2014 Grant Co.
- Breeding Phenology:
Eggs: 26 May-21 Jun
Nestlings: 16 May-27 Jul
Fledglings: 6-14 Jul
Fall: summer <<<>>> Sep 7, 7, 8 (north, west), summer <<<>>> Oct 3, 4, 5 (south, east)
Departure in the north is completed by late Aug, with later dates 12 Sep 2015 Holt Co and 23 Sep 2015 Thomas Co, and in the south and east late Sep, with later reports 8 Oct 1996 Otoe Co (Falk 2002), 11 Oct 1983 Lincoln Co, 13 Oct 1987 Lincoln Co, and 17 Oct 2000 Indian Cave SP, Richardson Co.
There are very few Panhandle reports, most from Scotts Bluff Co, 23 Aug 1991, 28 Aug 1978, 28 Sep 1961, and 3 Oct 2008; away from Scotts Bluff Co, reports are 9 Aug 2018 Sioux Co, 15 Aug 1992 Garden Co, 14 Sep 2013 Oliver Reservoir SRA, Kimball Co, and 17 Sep 1973 Sioux Co.
- High counts: 30 at Calamus Reservoir 20 Aug 1995, 28 at Rock Creek SRA, Dundy Co 1 Sep 2018, and 11 there 31 Aug 2017.
BBS: Breeding Bird Survey
NNF: Nebraska National Forest
NWR: National Wildlife Refuge
SHP: State Historical Park
SP: State Park
SRA: State Recreation Area
UNSM: University of Nebraska State Museum
WMA: Wildlife Management Area (State)
Ducey, J.E. 1988. Nebraska birds, breeding status and distribution. Simmons-Boardman Books, Omaha, Nebraska, USA.
Falk, L. 2002. Birds in Otoe County. Published by the author, Nebraska City, Nebraska, USA.
Gill, F., and D. Donsker (Eds). 2017. IOC World Bird List (v 7.3), accessed 30 January 2018.
Johnsgard, P.A. 1979. Birds of the Great Plains: breeding species and their distribution. University of Nebraska Press, Lincoln, Nebraska, USA.
Jorgensen, J.G. 2012. Birds of the Rainwater Basin, Nebraska. Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.
Kus, B., S.L. Hopp, R.R. Johnson, and B.T. Brown. 2010. Bell’s Vireo (Vireo bellii), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bna.35
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.
Rosche, R.C. 1982. Birds of northwestern Nebraska and southwestern South Dakota, an annotated checklist. Cottonwood Press, Crawford, Nebraska, USA.
Rosche, R.C. 1994. Birds of the Lake McConaughy area and the North Platte River valley, Nebraska. Published by the author, Chadron, Nebraska, USA.
Sauer, J.R., D.K. Niven, J.E. Hines, D.J. Ziolkowski, Jr, K.L. Pardieck, J.E. Fallon, and W.A. Link. 2017. The North American Breeding Bird Survey, Results and Analysis 1966 – 2015 (Nebraska). Version 2.07. USGS Patuxent Wildlife Research Center, Laurel, Maryland, USA.
Williams, F. 1987. Southern Great Plains Region. American Birds 41: 454-458.
Silcock, W.R., and J.G. Jorgensen. 2018. Bell’s Vireo (Vireo bellii), Version 1.0. In Birds of Nebraska — Online. www.BirdsofNebraska.org