Sexual dimorphism in bill curvature in Phaethornithinae. Values in boxes are bill curvature dimorphisms calculated for extant taxa or reconstructed for ancestral species. Black shading indicates bill curvature dimorphism greater than 30%, whereas white boxes represent moderate (approximately 25%) or no bill curvature dimorphism. Note that the non-hermit Eriocnemis luciani is the only taxon with male biased bill curvature dimorphism (gray shading). Arrows represent transitions (greater than 5%) in bill curvature dimorphism for hermit hummingbirds, which are either toward increasing female bias (arrows up) or decreasing female bias (arrows down). Photographs of species depict female above and male below. See Temeles et al. 2010 for details.

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