1Value derived from the sum of primary hybrid pairings of Golden-winged Warblers in 1998-’99 and primary hybrid pairings for Golden-winged and Blue-winged warblers in 2009-’10. Table 3. Pairing success rates for male Golden-winged, Blue-winged, and Brewster’s warblers for nine studies and for the pooled values and for the mean of the nine studies.