Status: Uncommon regular spring and fall migrant east, rare central, rare casual west.
Documentation: Specimen: UNSM ZM10533, 16 May 1917 Lancaster Co.
Taxonomy: No subspecies are recognized (Pyle 1997).
Spring: Apr 23,23,26 <<<>>> May 31, Jun 1,4
Migrants arrive in late Apr and depart by late May, with peak numbers mid-late May.
Away from the east, it is uncommon to rare; there are 13 reports from the central 4-24 May, and these few reports from the Panhandle: 30 Apr 1974 Scotts Bluff Co, 15 May 1971 Scotts Bluff Co, 26 May 2007 Scotts Bluff Co, and 29 May 1965 Sheridan Co (Short 1966).
Reports are increasing; in most years prior to 2010, 1-4 reports were the norm, but in 2013 there were 14, in 2016, 25+, and in 2018, 37. This may be, however, an artifact resulting from increasing ease of reporting to eBird or possibly confusion with other vireo species or some plumages of Warbling Vireo.
- High counts: 3-6 at Walnut Grove Park, Omaha 21 May 2009, 5 in Douglas Co 23 May 2008, 4 at Wehrspann Lake, Sarpy Co 29 May 2008, and 4 at Fontenelle Forest, Sarpy Co 11 May 2012. A total of 14 were reported 11-23 May 2013 and 25+ from 2-28 May 2016.
Fall: Aug 18,18,19 <<<>>> Oct 5,5,7
Migrants occur between late Aug and late Sep, although there are later reports 10 Oct 1997 Lancaster Co, 12 Oct 1973 and 12 Oct 1981, both from Douglas-Sarpy Cos, and 14 Oct 1974 Adams-Clay Cos.
There are few reports from the Panhandle, all documented: 3 Sep 1997 Riverside Park, Scottsbluff, Scotts Bluff Co, 6 Sep 2004 Scotts Bluff Co, 7 Sep 2001 Oliver Reservoir, Kimball Co, 21 Sep 2013 Banner Co, 28 Sep 1974 Dawes Co (Rosche 1982) and a very late record of one netted and photographed in Garden Co 5 Nov 1977 (Williams 1978).
There were no fall reports from 1979 until 1996, but numbers have been relatively high since then; seven were found in 1997, all in the east, six in the period 6-30 Sep. In 2001, eight were reported, including singles as far west as Oliver Reservoir and Lake McConaughy, in the period 7-16 Sep.
High counts: 3 at Fontenelle Forest 8 Sep 1998. Twelve were reported in fall 2014.
Comments: A report of one at Aurora, Hamilton Co 31 Aug 1948 (Chapman 1948) appears to be a misidentification of a yellowish juvenile Warbling Vireo (Jorgensen 2012).
A bird identified as a Yellow-green Vireo, V. flavoviridis, was reportedly collected at Long Pine, Brown Co by J.M. Bates (no date given) and sent to UNSM (Barbour 1896). This specimen cannot be located, however (Thomas Labedz, personal communication), and seems more likely to have been a Philadelphia Vireo. See species account for Yellow-green Vireo.
UNSM: University of Nebraska State Museum
Photograph (top) of a Philadelphia Vireo at Papillion, Sarpy Co 15 May 2018 by Phil Swanson.
Barbour, E.H. 1896. The occurrence in Nebraska of Vireo flavoviridis. Auk 13: 263.
Chapman, G. 1948. Philadelphia Vireo at Aurora, Nebraska. NBR 16: 93.
Jorgensen, J.G. 2012. Birds of the Rainwater Basin, Nebraska. Nebraska Game and Parks Commission, Lincoln, Nebraska, USA.
Pyle, P. 1997. Identification Guide to North American Birds. Part I, Columbidae to Ploceidae. Slate Creek Press, Bolinas, California, USA.
Rosche, R.C. 1982. Birds of northwestern Nebraska and southwestern South Dakota, an annotated checklist. Cottonwood Press, Crawford, Nebraska, USA.
Short, L.L., Jr. 1966. Some spring migrant and breeding records from northern Nebraska. NBR 34: 18.
Williams, F. 1978. Southern Great Plains Region. American Birds 32: 1024-1028.
Silcock, W.R., and J.G. Jorgensen. 2018. Philadelphia Vireo (Vireo philadelphicus), Version 1.0. In Birds of Nebraska — Online. www.BirdsofNebraska.org
Birds of Nebraska – Online