Blue-winged and Golden-winged Warblers are closely related genetically. Recent studies indicate the two species share 99.97% of their genomes. As a result hybrid forms of the two species are possible . The more common hybrid - Brewster's Warbler - results from transmission of a dominant gene from one or both parents. The less common variant - Lawrence's Warbler - is due to transmission of a recessive gene from both parents. Golden-winged Warblers are in steep decline due to habitat destruction and other factors. The first three photos below were taken in May of 2020, the Lawrence's Warbler image is from June 2019.
Golden-winged Warbler
Brewster's Warbler
Lawrence's Warbler
