Vermivora chrysoptera x VERMIVORA cyanoptera Status: Rare casual spring and fall migrant east. Documentation: Brewster’s Warbler: photograph, 18 May 2020 Madison Co (Brogie, in gallery); Brewster’s Warbler apparent backcross (F2 Brewster’s and Golden-winged) with Blue-winged Warbler: photograph, 21 May 2020 Sarpy Co (Swanson, in gallery). Lawrence’s Warbler: photograph 25 May 2021 Sarpy Co (Swanson, in […]