Fig. 2: The contribution of hummingbird spectra to the known avian color gamut.
From: Hummingbird plumage color diversity exceeds the known gamut of all other birds
a–c The distribution of color points of our hummingbird data (gray) and Stoddard and Prum’s (2011) data for all birds (black) in an avian VS color space viewed from different directions: a standard angle, b a top-down view displaying the expansion of hummingbird plumage colors in s-, m-, and l- dimensions, and c a view toward the l-m edge from slightly below displaying the expansion of hummingbird colors toward the s-v-l face of the color space, and the paucity of color points in the m+ uv/v region of the color space. d Corresponding Robinson projection of color point hues showing the expansion of hummingbird colors in terms of hues, especially in the s−, s+ m−, s+l−, and s+l+uv/v− regions.
