The gray and white plumage and black throat of the Golden-winged warbler is somewhat reminiscent of a chickadee but note the yellow forehead and wing patch of the warbler. The Blue-winged Warbler occassionally hybridizes with the Golden-winged Warbler to produce offspring with characteristics of both parents. Some have mostly white underparts but the face pattern of the Blue-winged Warbler (Brewster's Warbler), while some have the yellow plumage of the Blue-winged but the face pattern of the Golden-winged (Lawrence's Warbler). These hybrids sometimes backcross with Blue-winged or Golden-winged to produce offspring more similar to Blue-winged or Golden-winged.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.