A. Wilson, 1811,
Very similar, in plumage and, according to one study, genetically, to G. semiflava. Has hybridized with Vermivora cyanoptera (hybrid originally described as a new species, Helminthophaga cincinnatiensis); one of the two specimens of this pairing originally thought to have involved G. philadelphia, rather than present species. Recent record of hybridization with G. philadelphia. Birds in N of breeding range have been separated as race umbratica, apparently paler yellow below and more yellowish-olive on upperparts, but inadequately differentiated from birds in rest of species’ range. Treated as monotypic.
E USA from S Wisconsin, Iowa, E Kansas and E Texas E to New Jersey, S to C Louisiana, NW Florida and E Georgia. Migrates to wintering grounds from E & S Mexico S to Panama, also irregularly in adjacent N Colombia and N Venezuela and Caribbean.
Food and feeding
Status and conservation
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